Assertion: sea urchin | /r/HasProperty | round
Facets:
value: for a non-specialist observer
type: OTHER
Source sentences:
text: For a non-specialist observer, all sea urchins are round.
text: The sea urchin is a round, spiny marine creature found in most of the world's oceans.
text: Sea urchins, the round and spiky creatures that hang out on the bottom of the ocean floor, can be found in both shallow and deep waters.