Identifying Sources of Opinions with Conditional Random Fields and Extraction Patterns.
Yejin ChoiClaire CardieEllen RiloffSiddharth PatwardhanPublished in: HLT/EMNLP (2005)
Keyphrases
- conditional random fields
- information extraction
- extraction patterns
- relation extraction
- hidden markov models
- probabilistic model
- graphical models
- named entity recognition
- maximum entropy
- markov random field
- higher order
- information extraction systems
- generative model
- manually annotated
- pairwise
- text documents
- web page prediction
- segmentation method
- data sources
- web documents
- named entities
- natural language processing
- prior knowledge