Keyphrases
- relation extraction
- automatic extraction
- information extraction
- domain specific
- semantic relations
- named entities
- semantic role labeling
- dependency tree
- dependency trees
- broad coverage
- reference resolution
- question answering
- semantic features
- tree kernels
- named entity recognition
- artificial intelligence
- natural language processing
- maximum entropy
- semantic information
- structured data
- co occurrence
- domain knowledge
- keywords
- machine learning