Keyphrases
- passage retrieval
- question answering
- question answering systems
- document retrieval
- qa systems
- audio visual
- language model
- retrieval model
- information retrieval
- query expansion
- quantitative evaluation
- natural language
- retrieval systems
- relevance model
- free text
- natural language processing
- language modeling
- multi modal
- semantic relatedness
- information extraction
- vector space model
- probabilistic model
- ground truth
- pseudo relevance feedback
- correct answers
- information retrieval systems
- knowledge base