Keyphrases
- question answering
- language model
- passage retrieval
- information retrieval
- language modeling
- document retrieval
- n gram
- query expansion
- probabilistic model
- sentence retrieval
- question classification
- question answering systems
- retrieval model
- natural language processing
- relevance feedback
- speech recognition
- natural language
- test collection
- information extraction
- relevance model
- cross language
- visual information
- translation model
- named entities
- query terms
- low level
- vector space model
- pseudo relevance feedback
- multi modal
- visual data
- audio visual
- visual features
- text documents
- qa systems