Assertion: mallard | /r/CapableOf | fly at altitude
Facets:
value: usually
type: TEMPORAL
value: between 400 to 2,000 feet
type: LOCATION
Source sentences:
text: Mallards usually fly at altitudes between 400 to 2,000 feet, but have been spotted much higher and have even got into crashes with commercial airliners above 20,000 feet.