Charles E (Charley) Beller  Charles E (Charley) Beller photo         

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Senior NLP Engineer, Master Inventor
Baltimore, MD
  

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2019

Harvesting question/answer training data from watched hypotheses in a deep qa system
Charles E Beller, William G Dubyak, Palani Sakthi, Kristen M Summers
US Patent App. 15/721,097

Identifying complimentary physical components to known physical components
Charles E Beller, Benjamin L Johnson
US Patent App. 10/217,031

Identity verification using biometric data and non-invertible functions via a blockchain
Aaron K Baughman, Charles E Beller, Sean M FUOCO, Chennakesavalu GOVINDASAMY, Palani Sakthi
US Patent App. 15/688,042

Identifying Complimentary Physical Components to Known Physical Components
Charles E Beller, Benjamin L Johnson
US Patent App. 16/163,035

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A Zamora Duran
US Patent App. 15/646,425

Post-processing for identifying nonsense passages in a question answering system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, Julie T Yu
US Patent App. 15/152,747

Post-processor for collecting related factoid answers into a single object
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/657,977

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A ZAMORA DURAN
US Patent App. 10/181,242

Emergency authorization to access data on proximate computing devices
Charles E Beller, Gregory J Boss, II Rick A Hamilton, Jayashree VAIDYANATHAN
US Patent App. 15/658,833

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A ZAMORA DURAN
US Patent App. 15/646,425

Post-processor for factoid answer conversions into structured relations in a knowledge base
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/657,936

Post-processing for identifying nonsense passages in a question answering system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent App. 10/169,328

Harvesting question/answer training data from watched hypotheses in a deep qa system
Charles E Beller, William G Dubyak, Palani Sakthi, Kristen M Summers
US Patent App. 15/721,097

Identifying complimentary physical components to known physical components
Charles E Beller, Benjamin L Johnson
US Patent App. 10/217,031

Identity verification using biometric data and non-invertible functions via a blockchain
Aaron K Baughman, Charles E Beller, Sean M FUOCO, Chennakesavalu GOVINDASAMY, Palani Sakthi
US Patent App. 15/688,042

Identifying Complimentary Physical Components to Known Physical Components
Charles E Beller, Benjamin L Johnson
US Patent App. 16/163,035

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A Zamora Duran
US Patent App. 15/646,425

Post-processing for identifying nonsense passages in a question answering system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, Julie T Yu
US Patent App. 15/152,747

Post-processor for collecting related factoid answers into a single object
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/657,977

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A ZAMORA DURAN
US Patent App. 10/181,242

Emergency authorization to access data on proximate computing devices
Charles E Beller, Gregory J Boss, II Rick A Hamilton, Jayashree VAIDYANATHAN
US Patent App. 15/658,833

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A ZAMORA DURAN
US Patent App. 15/646,425

Post-processor for factoid answer conversions into structured relations in a knowledge base
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/657,936

Post-processing for identifying nonsense passages in a question answering system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent App. 10/169,328


2018

Generating semantic variants of natural language expressions using type-specific templates
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,910,848

Type-specific rule-based generation of semantic variants of natural language expression
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,928,235

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 10/073,831

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 10/073,833

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A ZAMORA DURAN
US Patent App. 10/026,279

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/618,910

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/454,778

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent 9,996,526

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A Zamora Duran
US Patent App. 15/794,402

Source verification device
Charles E Beller, Gregory J Boss, Christopher L Molloy, Bernadette A Pierson
US Patent App. 15/610,886

Candidate answer generation for explanatory questions directed to underlying reasoning regarding the existence of a fact
Charles E Beller, William G Dubyak
US Patent App. 10/147,051

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 16/003,794

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 16/003,772

Leveraging extracted entity and relation data to automatically filter data streams
Charles E Beller, William G Dubyak, Joshua G Hong, Brian L Keith, Palani Sakthi, Kristen M Summers
US Patent App. 15/625,402

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/454,778

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/618,910

System and method for rapid annotation of media artifacts with relationship-level semantic content
Charles E Beller, Chengmin Ding, Adam D Dumey, Allen B Ginsberg, SHEK Elinna
US Patent App. 15/467,283

Leveraging extracted entity and relation data to automatically filter data streams
Charles E Beller, William G Dubyak, Joshua G Hong, Brian L Keith, Palani Sakthi, Kristen M Summers
US Patent App. 15/467,289

System and method for type-specific answer filtering for numeric questions
Charles E Beller, Sean L Bethard, Edward G Katz
US Patent App. 15/467,280

Processing of String Inputs Utilizing Machine Learning
Charles E Beller, Chengmin Ding, Allen Ginsberg, SHEK Elinna
US Patent App. 15/376,942

Crowdsourced discovery of paths in a knowledge graph
Charles E Beller, Donna K Byron, Benjamin L Johnson
US Patent App. 15/413,103

System and method for augmenting answers from a qa system with additional temporal and geographic information
Chris F ACKERMANN, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 15/399,164

System and method for personalized deep text analysis
Charles E Beller, Richard L Darden, Sakthi Palani, Yashavant Singh
US Patent App. 15/406,917

Process for identifying completion of domain adaptation dictionary activities
Charles E Beller, Paul J Chase, Richard Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps
US Patent App. 15/400,300

SYSTEM AND METHOD FOR AUGMENTING ANSWERS FROM A QA SYSTEM WITH ADDITIONAL TEMPORAL AND GEOGRAPHIC INFORMATION
Chris F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 15/627,179

Preprocessing of String Inputs in Natural Language Processing
Charles E Beller, Chengmin Ding, Allen Ginsberg, Elinna Shek
US Patent App. 15/376,923

Optimization of Sentence Boundary Placement
Charles E Beller, Chengmin Ding, Allen Ginsberg, Elinna Shek
US Patent App. 15/376,960

System and method for generating improved search queries from natural language questions
Charles E Beller, Sean L Bethard, William G Dubyak, Alexander C Tonetti, Sean T Thatcher, T Yu Julie
US Patent App. 15/359,010

CORPUS MANAGEMENT BY AUTOMATIC CATEGORIZATION INTO FUNCTIONAL DOMAINS TO SUPPORT FACETED QUERYING
Charles E Beller, William G Dubyak, Palani Sakthi, Kristin M Summers
US Patent App. 15/354,556

Identifying Physical Tools to Manipulate Physical Components
Charles E Beller, Benjamin L Johnson
US Patent App. 15/292,305

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent 9,996,525

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent 9,996,526

Identifying Complimentary Physical Components to Known Physical Components
Charles E Beller, Benjamin L Johnson
US Patent App. 15/292,320

Techniques for assigning confidence scores to relationship entries in a knowledge graph
Charles E Beller, Chengmin Ding, Adam Dumey, SHEK Elinna
US Patent App. 15/253,113

Responding to user input based on confidence scores assigned to relationship entries in a knowledge graph
Charles E Beller, Chengmin Ding, Adam Dumey, SHEK Elinna
US Patent App. 15/253,144

Automatic evaluation of a knowledge canvassing application
Charles E Beller, Kristen M Summers
US Patent App. 15/238,172

Automatic evaluation of a knowledge canvassing application
Charles E Beller, Kristen M Summers
US Patent App. 15/238,273

Dynamic threshold filtering for watched questions
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/205,077

Evaluating Temporal Relevance in Cognitive Operations
Charles E Beller, Paul J Chase, Richard L Darden, Edward G Katz, others
US Patent App. 15/214,561

Generating semantic variants of natural language expressions using type-specific templates
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,910,848

Type-specific rule-based generation of semantic variants of natural language expression
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,928,235

Evaluating Temporal Relevance in Question Answering
Charles E Beller, Paul J Chase, Richard L Darden, Edward G Katz, others
US Patent App. 15/214,529

Dynamic threshold filtering for watched questions
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/205,075

Generating semantic variants of natural language expressions using type-specific templates
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,910,848

Type-specific rule-based generation of semantic variants of natural language expression
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,928,235

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 10/073,831

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 10/073,833

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A ZAMORA DURAN
US Patent App. 10/026,279

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/618,910

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/454,778

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent 9,996,526

Personalized emergency evacuation plan
Charles E Beller, Gregory J Boss, Mary Diane Swift, Edgar A Zamora Duran
US Patent App. 15/794,402

Source verification device
Charles E Beller, Gregory J Boss, Christopher L Molloy, Bernadette A Pierson
US Patent App. 15/610,886

Candidate answer generation for explanatory questions directed to underlying reasoning regarding the existence of a fact
Charles E Beller, William G Dubyak
US Patent App. 10/147,051

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 16/003,794

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 16/003,772

Leveraging extracted entity and relation data to automatically filter data streams
Charles E Beller, William G Dubyak, Joshua G Hong, Brian L Keith, Palani Sakthi, Kristen M Summers
US Patent App. 15/625,402

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/454,778

Domain-specific method for distinguishing type-denoting domain terms from entity-denoting domain terms
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, James E Ramirez, others
US Patent App. 15/618,910

System and method for rapid annotation of media artifacts with relationship-level semantic content
Charles E Beller, Chengmin Ding, Adam D Dumey, Allen B Ginsberg, SHEK Elinna
US Patent App. 15/467,283

Leveraging extracted entity and relation data to automatically filter data streams
Charles E Beller, William G Dubyak, Joshua G Hong, Brian L Keith, Palani Sakthi, Kristen M Summers
US Patent App. 15/467,289

System and method for type-specific answer filtering for numeric questions
Charles E Beller, Sean L Bethard, Edward G Katz
US Patent App. 15/467,280

Processing of String Inputs Utilizing Machine Learning
Charles E Beller, Chengmin Ding, Allen Ginsberg, SHEK Elinna
US Patent App. 15/376,942

Crowdsourced discovery of paths in a knowledge graph
Charles E Beller, Donna K Byron, Benjamin L Johnson
US Patent App. 15/413,103

System and method for augmenting answers from a qa system with additional temporal and geographic information
Chris F ACKERMANN, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 15/399,164

System and method for personalized deep text analysis
Charles E Beller, Richard L Darden, Sakthi Palani, Yashavant Singh
US Patent App. 15/406,917

Process for identifying completion of domain adaptation dictionary activities
Charles E Beller, Paul J Chase, Richard Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps
US Patent App. 15/400,300

SYSTEM AND METHOD FOR AUGMENTING ANSWERS FROM A QA SYSTEM WITH ADDITIONAL TEMPORAL AND GEOGRAPHIC INFORMATION
Chris F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent App. 15/627,179

Preprocessing of String Inputs in Natural Language Processing
Charles E Beller, Chengmin Ding, Allen Ginsberg, Elinna Shek
US Patent App. 15/376,923

Optimization of Sentence Boundary Placement
Charles E Beller, Chengmin Ding, Allen Ginsberg, Elinna Shek
US Patent App. 15/376,960

System and method for generating improved search queries from natural language questions
Charles E Beller, Sean L Bethard, William G Dubyak, Alexander C Tonetti, Sean T Thatcher, T Yu Julie
US Patent App. 15/359,010

CORPUS MANAGEMENT BY AUTOMATIC CATEGORIZATION INTO FUNCTIONAL DOMAINS TO SUPPORT FACETED QUERYING
Charles E Beller, William G Dubyak, Palani Sakthi, Kristin M Summers
US Patent App. 15/354,556

Identifying Physical Tools to Manipulate Physical Components
Charles E Beller, Benjamin L Johnson
US Patent App. 15/292,305

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent 9,996,525

System and method for supplementing a question answering system with mixed-language source documents
Christopher F Ackermann, Charles E Beller, Stephen A Boxwell, Stanley J Vernier
US Patent 9,996,526

Identifying Complimentary Physical Components to Known Physical Components
Charles E Beller, Benjamin L Johnson
US Patent App. 15/292,320

Techniques for assigning confidence scores to relationship entries in a knowledge graph
Charles E Beller, Chengmin Ding, Adam Dumey, SHEK Elinna
US Patent App. 15/253,113

Responding to user input based on confidence scores assigned to relationship entries in a knowledge graph
Charles E Beller, Chengmin Ding, Adam Dumey, SHEK Elinna
US Patent App. 15/253,144

Automatic evaluation of a knowledge canvassing application
Charles E Beller, Kristen M Summers
US Patent App. 15/238,172

Automatic evaluation of a knowledge canvassing application
Charles E Beller, Kristen M Summers
US Patent App. 15/238,273

Dynamic threshold filtering for watched questions
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/205,077

Evaluating Temporal Relevance in Cognitive Operations
Charles E Beller, Paul J Chase, Richard L Darden, Edward G Katz, others
US Patent App. 15/214,561

Generating semantic variants of natural language expressions using type-specific templates
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,910,848

Type-specific rule-based generation of semantic variants of natural language expression
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,928,235

Evaluating Temporal Relevance in Question Answering
Charles E Beller, Paul J Chase, Richard L Darden, Edward G Katz, others
US Patent App. 15/214,529

Dynamic threshold filtering for watched questions
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, Christopher Phipps, others
US Patent App. 15/205,075


2017

Pre-processing for identifying nonsense passages in documents being ingested into a corpus of a natural language processing system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent 9,842,096

Candidate Answer Generation for Explanatory Questions Directed to Underlying Reasoning Regarding the Existence of a Fact
Charles E Beller, William G Dubyak
US Patent App. 14/974,327

Answer Scoring Based on a Combination of Specificity and Informativity Metrics
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, others
US Patent App. 15/182,972

Automated Answer Scoring Based on Combination of Informativity and Specificity Metrics
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, others
US Patent App. 15/182,837

Pre-processing for identifying nonsense passages in documents being ingested into a corpus of a natural language processing system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent 9,842,096

Post-Processing for Identifying Nonsense Passages in a Question Answering System
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent App. 15/152,747

Candidate Answer Generation for Explanatory Questions Directed to Underlying Reasoning Regarding the Existence of a Fact
Charles E Beller, William G Dubyak
US Patent App. 14/974,327

Precision batch interaction with a question answering system
Charles Evan Beller, William G Dubyak, Palani Sakthi, Kristen Maria Summers
US Patent App. 15/001,848

Automated determination of document utility for a document corpus
Charles Evan Beller, William G Dubyak, Palani Sakthi, Kristen Maria Summers
US Patent App. 15/017,089

Identifying Nonsense Passages in a Question Answering System Based on Domain Specific Policy
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent App. 15/152,906

User interface for supplementing an answer key of a question answering system using semantically equivalent variants of natural language expressions
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,767,094

Pre-processing for identifying nonsense passages in documents being ingested into a corpus of a natural language processing system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent 9,842,096

Candidate Answer Generation for Explanatory Questions Directed to Underlying Reasoning Regarding the Existence of a Fact
Charles E Beller, William G Dubyak
US Patent App. 14/974,327

Answer Scoring Based on a Combination of Specificity and Informativity Metrics
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, others
US Patent App. 15/182,972

Automated Answer Scoring Based on Combination of Informativity and Specificity Metrics
Charles E Beller, Paul J Chase, Richard L Darden, Michael Drzewucki, Edward G Katz, others
US Patent App. 15/182,837

Pre-processing for identifying nonsense passages in documents being ingested into a corpus of a natural language processing system
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent 9,842,096

Post-Processing for Identifying Nonsense Passages in a Question Answering System
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent App. 15/152,747

Candidate Answer Generation for Explanatory Questions Directed to Underlying Reasoning Regarding the Existence of a Fact
Charles E Beller, William G Dubyak
US Patent App. 14/974,327

Precision batch interaction with a question answering system
Charles Evan Beller, William G Dubyak, Palani Sakthi, Kristen Maria Summers
US Patent App. 15/001,848

Automated determination of document utility for a document corpus
Charles Evan Beller, William G Dubyak, Palani Sakthi, Kristen Maria Summers
US Patent App. 15/017,089

Identifying Nonsense Passages in a Question Answering System Based on Domain Specific Policy
Charles E Beller, Michael Drzewucki, Christopher Phipps, Kristen M Summers, T Yu Julie
US Patent App. 15/152,906

User interface for supplementing an answer key of a question answering system using semantically equivalent variants of natural language expressions
Charles E Beller, Edward G Katz, Alexander C Tonetti
US Patent 9,767,094