Assertion: sand dollar | /r/HasProperty | dark
Facets:
value: in color
type: OTHER
value: due to many spines
type: CAUSE
Source sentences:
text: Sand dollars are dark in color due to many spines that cover the outer skeleton.
text: If a SAND DOLLAR is dark in color and half buried in the sand and/or water, it is most likely still alive and we should let it stay in its place in the water.