Assertion: elephant's tusk | /r/CapableOf | differ in shape
Facets:
Source sentences:
text: Tusks on an individual elephant can differ in shape, length, thickness and growth direction.
text: Tusks differ in shape, size and length thus researchers can use them to identify the individual.
text: Tusks will differ in size, shape and direction; researchers use them (and the elephant's ears) to identify individuals.