Keyphrases
- question answering
- passage retrieval
- information retrieval
- sentence retrieval
- answer extraction
- question answering systems
- information extraction
- natural language
- qa clef
- named entities
- natural language processing
- retrieval systems
- document retrieval
- information retrieval systems
- cross language
- image retrieval
- question classification
- open domain question answering
- retrieval model
- syntactic information
- speech transcripts
- candidate answers
- text retrieval
- test collection
- natural language questions
- feature weighting
- qa systems
- relation extraction
- textual entailment recognition
- language model