Keyphrases
- tree structure
- event detection
- tree structured data
- binary tree
- structured data
- information extraction
- biomedical text
- tree construction
- text mining
- automatic detection
- neural network
- biomedical data
- spanning tree
- tree structures
- event driven
- data sets
- tree structured patterns
- event recognition
- phylogenetic trees
- news stories
- graph structure
- hierarchical structure
- information retrieval