Keyphrases
- question answering
- information extraction
- natural language processing
- information retrieval
- natural language
- cross language
- passage retrieval
- named entities
- qa clef
- question answering systems
- syntactic information
- natural language questions
- question classification
- search engine
- artificial intelligence
- qa systems
- answering questions
- open domain question answering
- answer extraction
- candidate answers
- semantic roles