Assertion: dinosaur's feather | /r/CapableOf | function as insulation
Facets:
value: to keep dinosaurs
type: PURPOSE
Source sentences:
text: Feathers evolved before flight and may have functioned as insulation to keep dinosaurs warm, or for display as a way to attract mates.
text: Feathers evolved before flight and may have functioned as insulation to keep dinosaurs warm, or for display as a way to attract mates.