Keyphrases
- relation extraction
- named entities
- entity extraction
- coreference resolution
- named entity recognizer
- information extraction
- automatic extraction
- named entity recognition
- unsupervised learning
- domain specific
- question answering
- semantic relations
- semantic role labeling
- broad coverage
- named entity disambiguation
- semantic features
- co occurrence
- natural language processing
- dependency trees
- text mining
- parse tree
- tree kernels
- entity ranking
- feature extraction
- feature selection
- information retrieval
- text documents
- general purpose
- domain knowledge