Keyphrases
- question answering
- information retrieval
- natural language
- visual information
- information extraction
- question classification
- question answering systems
- natural language processing
- passage retrieval
- sentence retrieval
- syntactic information
- cross language
- named entities
- visual features
- low level
- natural language questions
- qa clef
- answer validation
- open domain question answering
- relation extraction
- machine learning
- candidate answers
- answer extraction
- answering questions