Keyphrases
- relation extraction
- semi supervised
- named entity recognition
- co training
- semi supervised learning
- named entities
- information extraction
- automatic extraction
- weakly supervised
- unlabeled data
- domain specific
- question answering
- labeled data
- semantic relations
- active learning
- pairwise
- semantic role labeling
- broad coverage
- dependency trees
- supervised learning
- semantic features
- unsupervised learning
- probabilistic model
- training set
- tree kernels
- data mining
- co occurrence
- text mining
- learning algorithm