Keyphrases
- relation extraction
- information extraction
- automatic extraction
- domain specific
- semantic relations
- named entities
- semantic features
- semantic role labeling
- dependency tree
- question answering
- named entity recognition
- broad coverage
- reference resolution
- dependency trees
- tree kernels
- co occurrence
- knowledge discovery
- domain knowledge
- data mining
- semantic information
- natural language processing
- parse tree
- high level
- search engine
- information retrieval