Keyphrases
- question answering
- question classification
- information retrieval
- sentence retrieval
- natural language
- information extraction
- natural language processing
- passage retrieval
- qa clef
- question answering systems
- cross language
- natural language questions
- syntactic information
- named entities
- keywords
- open domain question answering
- candidate answers
- qa systems
- answer extraction
- semantic roles
- answering questions
- answer validation
- semantic role labeling
- text summarization
- query processing