Assertion: duck's duckling | /r/HasAspect | feather
Facets:
value: to stay warm
type: PURPOSE
value: after about two months
type: TEMPORAL
Source sentences:
text: After about two months, ducklings have feathers that enable them to fly, thus becoming independent.
text: As said in the previous section, ducks are precocial species because of which ducklings are born with their eyes open and already have down feathers to stay warm.