Keyphrases
- relation extraction
- semantic information
- semantic features
- wordnet
- semantic relations
- semantic knowledge
- semantic analysis
- low level features
- semantic role labeling
- structural features
- automatic extraction
- metadata
- domain knowledge
- low level
- visual information
- named entities
- domain specific
- linguistic features
- contextual information
- natural language text
- semantic similarity
- high level
- keywords
- syntactic information
- question answering
- background knowledge
- information extraction
- named entity recognition
- xml documents
- parse tree
- natural language processing
- co occurrence
- structural information
- knowledge base