Assertion: stingray's spine | /r/HasProperty | venomous
Facets:
Source sentences:
text: Stingrays use the venomous spines and serrated barbs on the base of their tails as a defense mechanism when they feel threatened.
text: The spine is poisonous and used for defense.
text: Stingrays have one or two venomous spines located at the base of their whip-like tails.
text: Though not aggressive, the stingray is equipped with a fearsome means of defense—a venomous spine found near the base of its powerful, whip-like tail.
text: Stingrays have an unfair reputation of being aggressive, thanks to their venomous spines.