Assertion: eagle ray's spine | /r/ObjectUse | used in defense
Facets:
value: against potential threats
type: TRANSITIVE-OBJECT
Source sentences:
text: Spotted eagle rays have venomous spines on their tails that are used in defense against threats.
text: These venomous spines can deliver a nasty sting when used in defense against potential threats.
text: When these venous spines are used in defense against potential threats, they can really deliver a very nasty sting.