Keyphrases
- question answering
- natural language processing
- information extraction
- named entities
- question classification
- passage retrieval
- high level
- information retrieval
- sentence retrieval
- natural language questions
- natural language
- open domain question answering
- syntactic information
- question answering systems
- semantic roles
- cross language
- relation extraction
- qa systems
- candidate answers
- textual entailment recognition
- answer extraction
- qa clef
- answer validation