Assertion: frog's skin | /r/CapableOf | serve as warning
Facets:
value: to predators
type: TRANSITIVE-OBJECT
value: to other rainforest creatures
type: TRANSITIVE-OBJECT
Source sentences:
text: The brightly-colored skins of the poison dart frogs serve as a warning to other rainforest creatures.
text: Its bright blue skin, usually darker around its limbs and stomach, serves as a warning to predators.
text: Panamanian golden frogs expose themselves by day to predators such as snakes and birds, but their brightly colored skin serves as a warning.