Keyphrases
- question answering
- question classification
- natural language questions
- question answering systems
- syntactic information
- information retrieval
- answering questions
- information extraction
- natural language processing
- cross language
- question answer pairs
- answer validation
- natural language
- candidate answers
- open domain question answering
- knowledge representation
- free text
- named entities
- relation extraction
- passage retrieval
- answer extraction
- keywords
- textual entailment recognition
- test collection
- structured data
- text mining
- relational databases
- expert systems
- knowledge base
- machine learning