Evaluating retrieval performance for Japanese question answering: what are best passages?
Tetsuya SakaiTomoharu KokubuPublished in: SIGIR (2003)
Keyphrases
- question answering
- passage retrieval
- information retrieval
- document retrieval
- sentence retrieval
- question answering systems
- natural language processing
- natural language
- query expansion
- question classification
- named entities
- information extraction
- syntactic information
- retrieval model
- answer extraction
- cross language
- information retrieval systems
- retrieval systems
- qa clef
- candidate answers
- machine learning
- retrieval effectiveness
- relevance ranking
- relevant documents
- document collections
- wordnet
- answering questions
- natural language questions