Keyphrases
- question answering
- information retrieval
- information extraction
- natural language
- natural language processing
- question classification
- natural language questions
- named entities
- passage retrieval
- qa clef
- cross language
- open domain question answering
- sentence retrieval
- question answering systems
- relation extraction
- test collection
- relevance feedback
- syntactic information
- candidate answers
- answer extraction
- automatically generated
- answering questions
- language model