Assertion: dragonfly's insect | /r/CapableOf | engage to generate heat
Facets:
value: in wing-whirring
type: LOCATION
value: in the sun
type: LOCATION
value: in basking
type: LOCATION
value: often
type: TEMPORAL
value: before taking flight
type: TEMPORAL
Source sentences:
text: Dragonfly wing muscles must be warm to function optimally, and so, if cool, the insect often engages in wing-whirring and basking in the sun to generate heat before taking flight.