Keyphrases
- relation extraction
- semi supervised
- named entity recognition
- automatic extraction
- information extraction
- domain specific
- weakly supervised
- named entities
- semi supervised learning
- semantic role labeling
- question answering
- semantic relations
- supervised learning
- broad coverage
- labeled data
- semantic features
- unsupervised learning
- pairwise
- active learning
- general purpose
- dependency trees
- parse tree
- information retrieval
- named entity recognizer
- tree kernels
- graphical models
- natural language processing
- image retrieval
- web pages
- artificial intelligence
- learning algorithm