Assertion: firefly's bioluminescence | /r/HasProperty | useful tool
Facets:
value: for many organisms
type: TRANSITIVE-OBJECT
value: very
type: DEGREE
Source sentences:
text: Bioluminescence can in fact be a very useful tool for many organisms, allowing them to lure and capture prey with their gently light, attract mates with special light signals, or fend off predators that can be scared or distracted by the light.