Keyphrases
- question answering
- information retrieval
- question classification
- cross language
- natural language
- information extraction
- natural language processing
- sentence retrieval
- qa clef
- passage retrieval
- named entities
- open domain question answering
- syntactic information
- question answering systems
- semi supervised
- relation extraction
- unsupervised learning
- qa systems
- answer extraction
- natural language questions
- document retrieval
- topic modeling
- test set
- semantic roles
- multi modal
- candidate answers
- knowledge base
- search engine
- answer validation
- machine learning