Exploring Unsupervised Features in Conditional Random Fields for Spanish Named Entity Recognition.
Jenny CoparaJosé OchoaCamilo ThorneGoran GlavasPublished in: BRACIS (2016)
Keyphrases
- named entity recognition
- conditional random fields
- sequence labeling
- information extraction
- semi supervised
- crf model
- supervised training
- maximum entropy classifier
- named entities
- maximum entropy
- text summarization
- probabilistic model
- hidden markov models
- graphical models
- higher order
- relation extraction
- pairwise
- natural language processing
- dependency parsing
- markov networks
- co occurrence
- semantic role labeling
- discriminative models
- joint inference
- feature space
- unsupervised learning
- generative model
- markov random field
- feature set
- feature extraction
- pos taggers
- web page prediction