Keyphrases
- question answering
- information retrieval
- natural language processing
- cross language
- question classification
- information extraction
- qa clef
- syntactic information
- named entities
- visual information
- answer validation
- question answering systems
- sentiment analysis
- relation extraction
- natural language questions
- qa systems
- open domain question answering
- semantic roles
- passage retrieval
- natural language
- visual data
- answering questions
- low level
- search engine