Assertion: male porcupine | /r/CapableOf | fight each other
Facets:
value: often
type: TEMPORAL
value: over females
type: TRANSITIVE-OBJECT
Source sentences:
text: Male porcupines often fight each other—using their incisor teeth and quills as weapons— for the opportunity to mate with a receptive female.
text: Male porcupines often fight with each other over females.