Keyphrases
- question answering
- candidate answers
- question classification
- question answering systems
- natural language questions
- qa systems
- passage retrieval
- information extraction
- information retrieval
- natural language processing
- answer validation
- natural language
- answer extraction
- named entities
- semantic roles
- cross language
- answering questions
- qa clef
- question answer pairs
- syntactic information
- semi supervised
- textual entailment recognition
- correct answers
- relation extraction
- ranking functions
- artificial intelligence
- learning to rank