Keyphrases
- information retrieval
- question answering
- passage retrieval
- open domain question answering
- ir evaluation
- question classification
- query expansion
- document retrieval
- retrieval effectiveness
- text retrieval
- retrieval model
- question answering systems
- automatic indexing
- open domain
- question answer
- qa clef
- metadata
- genetic algorithm
- data sets
- cross language ir
- information access
- machine translation
- information retrieval systems
- relevance feedback
- artificial intelligence
- learning algorithm
- neural network