Conditional Random Fields for Spanish Named Entity Recognition Using Unsupervised Features.
Jenny CoparaJosé OchoaCamilo ThorneGoran GlavasPublished in: IBERAMIA (2016)
Keyphrases
- conditional random fields
- named entity recognition
- contextual features
- named entities
- sequence labeling
- information extraction
- supervised training
- question answering
- crf model
- graphical models
- co occurrence
- weakly supervised
- relation extraction
- semi supervised
- hidden markov models
- higher order
- natural language processing
- probabilistic model
- feature extraction
- structured prediction
- named entity extraction
- unsupervised learning
- text mining
- contextual information
- markov random field
- maximum entropy
- prior knowledge
- pairwise
- artificial intelligence
- feature vectors
- annotated corpus
- feature set
- superpixels
- supervised learning
- computer vision
- information retrieval