Keyphrases
- question answering
- database
- natural language processing
- question classification
- natural language
- databases
- question answering systems
- information retrieval
- information extraction
- cross language
- named entities
- database systems
- sentence retrieval
- qa clef
- open domain question answering
- textual entailment recognition
- query language
- relation extraction
- passage retrieval
- relational databases
- syntactic information
- natural language questions
- multi modal
- qa systems