Keyphrases
- question answering
- natural language processing
- information retrieval
- information extraction
- question classification
- cross language
- named entities
- visual information
- natural language
- open domain question answering
- generative model
- passage retrieval
- natural language questions
- candidate answers
- relation extraction
- qa clef
- visual features
- answer validation
- semantic roles
- question answering systems
- answer extraction
- answering questions
- expert systems
- machine translation
- sentence retrieval
- syntactic information
- visual data
- document retrieval