NTT's QA Systems for NTCIR QAC-1.
Yutaka SasakiHideki IsozakiTsutomu HiraoKoji KokuryouEisaku MaedaPublished in: NTCIR (2002)
Keyphrases
- question answering
- qa systems
- test collection
- question answering systems
- information retrieval
- cross language
- cross language information retrieval
- evaluation metrics
- answer validation
- information extraction
- natural language processing
- retrieval effectiveness
- evaluation methodology
- passage retrieval
- syntactic information
- natural language
- retrieval model
- named entities
- relevant documents
- average precision
- qa clef
- retrieval systems
- multi modal
- query translation
- candidate answers