Assertion: stingray's barb | /r/HasProperty | sharp
Facets:
Source sentences:
text: Stingrays sting with the sharp barb found in a their tails that carries a protein-based venom.
text: Stingrays have several sharp and venomous barbs on their tails that they use to defend themselves when they feel threatened, though experts at the time stressed that stingrays were not usually vicious and rarely attacked and killed humans.