Keyphrases
- relation extraction
- dependency tree
- dependency parsing
- named entities
- semantic role labeling
- natural language text
- text documents
- coreference resolution
- information extraction
- named entity recognizer
- automatic extraction
- named entity recognition
- semantic relations
- domain specific
- parse tree
- information retrieval
- text mining
- natural language processing
- document collections
- co occurrence
- document clustering
- question answering
- semantic features
- tree kernels
- information retrieval systems
- document classification
- noun phrases
- metadata
- xml documents
- dependency parser
- semantic information
- keywords
- unsupervised learning
- text classification
- natural language