Assertion: sea urchin's mouth | /r/HasProperty | strong
Facets:
Source sentences:
text: They feed on seaweed on the ocean floor using their strong mouths located on their undersides.
text: They feed on seaweed on the ocean floor using their strong mouths located on their undersides.
text: They feed on seaweed on the ocean floor using their strong mouths located on their undersides.
text: They feed on seaweed on the ocean floor using their strong mouths located on their undersides.
text: They feed on seaweed on the ocean floor using their strong mouths located on their undersides.
text: They feed on seaweed on the ocean floor using their strong mouths located on their undersides.