Keyphrases
- semantic role labeling
- syntactic and semantic dependencies
- recognizing textual entailment
- ranking algorithm
- ranking functions
- web search
- question answering
- link analysis
- learning to rank
- user feedback
- natural language
- neural network
- semantic parsing
- rank aggregation
- semantic representation
- document retrieval
- syntactic dependencies
- decision trees
- data sets
- definitional question answering