Assertion: python's fang | /r/HasProperty | hollow
Facets:
value: to inject venom
type: PURPOSE
Source sentences:
text: The fangs of 'advanced' venomous snakes like viperids and elapids are hollow to inject venom more effectively, while the fangs of rear-fanged snakes such as the boomslang merely have a groove on the posterior edge to channel venom into the wound.