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