This chapter covers the following recipes:
Sentence detection
Evaluation of sentence detection
Tuning sentence detection
Marking embedded chunks in a string – sentence chunk example
Paragraph detection
Simple noun phrases and verb phrases
Regular expression-based chunking for NER
Dictionary-based chunking for NER
Translating between word tagging and chunks – BIO codec
HMM-based NER
Mixing the NER sources
CRFs for chunking
NER using CRFs with better features