Assertion: guinea pig's food | /r/HasProperty | great
Facets:
value: as a source of vitamin c
type: PURPOSE
Source sentences:
text: Foods like carrots, kiwifruit, berries, and pineapple are also great as a source of Vitamin C but only should only be fed a few times a week, not every day as these foods have a high sugar content.
text: Guinea pigs cannot make vitamin C, so foods high in this vitamin are great choices.