Assertion: mallard | /r/HasProperty | got into crash
Facets:
value: above 20,000 feet
type: LOCATION
value: with commercial airliners
type: OTHER
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.