Using dual-layer CRFs for event causal relation extraction.
Jianfeng FuZongtian LiuWei LiuQiang GuoPublished in: IEICE Electron. Express (2011)
Keyphrases
- relation extraction
- information extraction
- named entity recognition
- conditional random fields
- named entities
- automatic extraction
- natural language processing
- domain specific
- semantic role labeling
- weakly supervised
- dependency trees
- broad coverage
- semantic relations
- question answering
- maximum entropy
- semi supervised
- higher order
- semantic features
- tree kernels
- bayesian networks
- information retrieval
- expert systems
- hidden markov models
- text mining
- named entity recognizer
- graphical models
- co occurrence
- support vector
- higher level
- knowledge acquisition
- machine learning