Assertion: common periwinkle | /r/HasProperty | herbivore
Facets:
Source sentences:
text: Common periwinkles are herbivores and feed on many types of algae, mainly the algae which grows fast and has a shorter lifespan, like sea-lettuce, brunslick, and purpurhinnor.
text: Common periwinkles are herbivores, using their file-like tongue, the radula, to feed on diatoms and algae attached to intertidal rocks.