The power and appeal of CRFs comes from rich feature extraction—proceed with an evaluation harness that provides feedback on your explorations. This recipe will detail how to create more complex features.
We will not train and run a CRF; instead, we will print out the features. Substitute this feature extractor for the one in the previous recipe to see them at work. Perform the following steps:
java -cp lingpipe-cookbook.1.0.jar:lib/lingpipe-4.1.0.jar: com.lingpipe.cookbook.chapter4.ModifiedCrfFeatureExtractor
------------------- Tagging: John/PN