An Overview of the 4th Question Answering Challenge (QAC-4) at NTCIR Workshop 6.
Jun-ichi FukumotoTsuneaki KatoFumito MasuiTatsunori MoriPublished in: NTCIR (2007)
Keyphrases
- question answering
- question answering systems
- information retrieval
- test collection
- cross language
- information extraction
- natural language
- natural language processing
- question classification
- natural language questions
- syntactic information
- passage retrieval
- cross language information retrieval
- named entities
- relation extraction
- semantic roles
- qa clef
- data mining
- query translation
- sentence retrieval