Keyphrases
- question answering
- information extraction
- information retrieval
- natural language
- question classification
- passage retrieval
- qa clef
- cross language
- named entities
- logic programming
- natural language processing
- relation extraction
- answer validation
- question answering systems
- syntactic information
- bayesian networks
- open domain question answering
- sentence retrieval
- answering questions
- natural language questions
- classical logic
- relational databases