Assertion: tern's plumage | /r/HasProperty | both defensive
Facets:
value: in many cases
type: TEMPORAL
Source sentences:
text: The plumage of seabirds is thought in many cases to be for camouflage, both defensive (the colour of US Navy battleships is the same as that of Antarctic prions, and in both cases it reduces visibility at sea) and aggressive (the white underside possessed by many seabirds helps hide them from prey below).