Assertion: pendulum clock | /r/HasProperty | replaced as domestic timekeeper
Facets:
value: during 1940s
type: TEMPORAL
value: during the 1930s
type: TEMPORAL
value: by the synchronous electric clock
type: OTHER
Source sentences:
text: The home pendulum clock began to be replaced as domestic timekeeper during the 1930s and 1940s by the synchronous electric clock, which kept more accurate time because it was synchronized to the oscillation of the electric power grid.