Assertion: wild boar's tusk | /r/HasProperty | sharpened
Facets:
value: by being ground against each other
type: MANNER
Source sentences:
text: In the male, the canine teeth form tusks, which grow continuously and are sharpened by constantly being ground against each other.
text: In the male the canine teeth can form tusks, which grow continuously and are sharpened by constantly being ground against each other.
text: In the male, the canine teeth form tusks, which grow continuously and are sharpened by constantly being ground against each other.