Keyphrases
- question answering
- information extraction
- information retrieval
- qa clef
- natural language processing
- natural language
- question classification
- cross language
- multimedia
- named entities
- passage retrieval
- open domain question answering
- relation extraction
- natural language questions
- automatically generated
- machine learning
- co occurrence
- syntactic information
- relevance feedback
- artificial intelligence
- answering questions