Assertion: pendulum clock | /r/CapableOf | keep time
Facets:
value: with a mechanism
type: OTHER
value: accurately
type: MANNER
Source sentences:
text: To keep time accurately, pendulum clocks must be absolutely level.
text: A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum.