Assertion: tower's foot | /r/HasProperty | 0.61 m
Facets:
Source sentences:
text: By day, a black ball at least 2 feet (0.61 m) in diameter was to be mounted high up where it could be seen; by night, two red lights in the same position.
text: The towers are anchored less than 2 feet (0.61 m) in the ground, and have been highlighted in architectural textbooks, and have changed the way some structures are designed for stability and endurance.