NTT's Question Answering System for NTCIR-6 QAC-4.
Ryuichiro HigashinakaHideki IsozakiPublished in: NTCIR (2007)
Keyphrases
- question answering systems
- test collection
- question answering
- question classification
- information retrieval
- natural language
- web retrieval
- evaluation metrics
- retrieval effectiveness
- open domain
- information retrieval systems
- document retrieval
- cross language information retrieval
- cross language
- ir evaluation
- cross lingual information retrieval
- patent retrieval
- average precision
- document collections
- answer extraction
- answer validation
- search tasks
- relevant documents
- evaluation methodology
- passage retrieval
- retrieval systems
- natural language processing
- information extraction
- english chinese
- semantic similarity
- semantic similarity computation