Exercise

Efficient phrase matching

Sometimes it's more efficient to match exact strings instead of writing patterns describing the individual tokens. This is especially true for finite categories of things – like all countries of the world.

We already have a list of countries, so let's use this as the basis of our information extraction script. A list of string names is available as the variable COUNTRIES. The nlp object and a test doc have already been created and the doc.text has been printed to the shell.

Instructions

100 XP

Import the PhraseMatcher and initialize it with the shared vocab as the variable matcher.
Add the phrase patterns and call the matcher on the doc.