Keyphrases
- social media
- information retrieval
- text mining
- data mining
- knowledge discovery
- question answering
- query expansion
- information extraction
- information filtering
- information retrieval systems
- mining algorithm
- social networks
- data mining algorithms
- relevant documents
- document retrieval
- data mining methods
- retrieval effectiveness
- sequential patterns
- test collection
- text classification
- web mining
- data sets
- document collections
- learning to rank
- social networking
- data mining techniques
- pattern discovery
- language model
- public opinion