Getting a Specific Taxonomy in PHP

#1

I have a the following page front matter:

title: Integrated Information Security Analysis Team
taxonomy:
	category: ['docs']
	policy: ['im']
	id: ['im-05']
modified_date: 07/17/2017

I am writing a plugin where I need to pull the $page->taxonomy(id); but that doesn’t seem to work? How do I read that value using php?