Assertion: stingray's barb | /r/AtLocation | a their tails
Facets:
Source sentences:
text: Stingrays sting with the sharp barb found in a their tails that carries a protein-based venom.
text: Stingrays have venomous barbs or spines located in their tail to protect themselves against predators, while skates use thorny nodes located on their tails and backs.