Keyphrases
- question answering
- natural language processing
- natural language
- information retrieval
- information extraction
- named entities
- cross language
- question classification
- syntactic information
- natural language questions
- semantic roles
- question answering systems
- relation extraction
- qa clef
- sentence retrieval
- open domain question answering
- passage retrieval
- answering questions
- structured data
- textual entailment recognition