Keyphrases
- question answering
- relation extraction
- natural language processing
- information retrieval
- information extraction
- named entities
- cross language
- natural language questions
- natural language
- qa clef
- question classification
- question answering systems
- passage retrieval
- syntactic information
- sentence retrieval
- answering questions
- open domain question answering
- data mining
- candidate answers
- multi modal
- search engine
- textual entailment recognition