Keyphrases
- question answering
- question classification
- question answering systems
- natural language questions
- answering questions
- qa systems
- answer validation
- candidate answers
- knowledge base
- answer extraction
- natural language
- natural language processing
- named entities
- qa clef
- information extraction
- information retrieval
- cross language
- question answer pairs
- semantic roles
- passage retrieval
- textual entailment recognition
- syntactic information
- sentence retrieval
- relation extraction
- artificial intelligence
- machine learning
- correct answers
- document retrieval
- probabilistic model
- relational databases
- open domain question answering