Assertion: trumpeter swan | /r/CapableOf | fly with difficulty
Facets:
value: to roost 6 to 9 metres
type: OTHER
value: at night
type: TEMPORAL
value: into trees
type: TRANSITIVE-OBJECT
Source sentences:
text: At night they fly with difficulty into trees to roost 6 to 9 metres (20 to 30 ft) above the ground.