Assertion: dolphin's whistle | /r/HasProperty | unique
Facets:
value: to a specific individual
type: TRANSITIVE-OBJECT
Source sentences:
text: Bottlenose dolphins have been found to have signature whistles, a whistle that is unique to a specific individual.
text: Some bottlenose dolphins facts have recently been revealed and show these dolphins have unique whistles that identify each dolphin.
text: Each dolphin has a unique whistle that functions like a name, allowing the marine mammals to keep close social bonds.