Keyphrases
- question answering
- qa clef
- natural language processing
- question classification
- natural language questions
- cross language
- named entities
- information retrieval
- video sequences
- natural language
- open domain question answering
- information extraction
- multimedia
- video content
- passage retrieval
- video data
- relation extraction
- question answering systems
- syntactic information
- sentence retrieval
- answering questions
- answer validation
- video retrieval
- semantic roles
- qa systems
- data mining