Keyphrases
- question answering
- general purpose
- information retrieval
- domain specific
- natural language
- natural language processing
- named entities
- cross language
- question classification
- passage retrieval
- information extraction
- question answering systems
- open domain question answering
- qa clef
- syntactic information
- relation extraction
- natural language questions
- qa systems
- multi modal
- textual entailment recognition
- knowledge base