Assertion: warthog's tusk | /r/HasProperty | ground against lower ones
Facets:
value: to produce sharp edges
type: PURPOSE
value: regularly
type: DEGREE
Source sentences:
text: The upper tusks are bent upwards in males, and are regularly ground against the lower ones to produce sharp edges.
text: The upper tusks are bent upwards in males, and are regularly ground against the lower ones to produce sharp edges.