Keyphrases
- relation extraction
- automatic extraction
- information extraction
- domain specific
- semantic relations
- dependency trees
- semantic role labeling
- named entities
- question answering
- semantic features
- information retrieval systems
- information retrieval
- coreference resolution
- named entity recognition
- reference resolution
- image retrieval
- tree kernels
- relevance feedback
- conditional random fields
- data mining
- pairwise
- parse tree
- machine learning