Using a chunker to find POS

The idea behind chunking is to group POS-related words together. In this recipe, we will use the OpenNLP ChunkerME class to perform chunking. This class uses maximum entropy to perform this task.

Getting ready

To prepare, we need to do the following:

1. Create a new Maven project.
2. Add the following dependency to the project's POM file:

<dependency>
    <groupId>org.apache.opennlp</groupId>
    <artifactId>opennlp-tools</artifactId>
    <version>1.9.0</version>
</dependency>

Download the files, en-pos-maxent.bin and en-chunker.bin, from http://opennlp.sourceforge.net/models-1.5/. Add the files to the root level of your project.

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