Assertion: boom's foot | /r/HasProperty | 30 m
Facets:
Source sentences:
text: The boom was produced by an F-4 flying just above the speed of sound at an altitude of 100 feet (30 m).
text: The boom was grappled by the Canadarm and served as an extension of the arm, doubling its length to a combined total of 100 feet (30 m).