Keyphrases
- passage retrieval
- question answering
- natural language processing
- information retrieval
- information extraction
- cross language
- qa clef
- question answering systems
- sentence retrieval
- natural language
- syntactic information
- open domain question answering
- question classification
- multimedia
- relation extraction
- answer extraction
- natural language questions
- answer validation
- named entities
- expert systems
- speech transcripts
- question answer pairs
- textual entailment recognition
- artificial intelligence