Keyphrases
- relation extraction
- named entities
- entity extraction
- coreference resolution
- named entity recognizer
- information extraction
- automatic extraction
- named entity recognition
- domain specific
- question answering
- semantic relations
- dependency trees
- text mining
- semantic role labeling
- dependency tree
- co occurrence
- broad coverage
- semantic features
- tree kernels
- reference resolution
- natural language processing
- general purpose
- contextual information
- natural language
- wordnet
- unsupervised learning