Assertion: pacemaker | /r/HasProperty | external
Facets:
value: in 1950
type: TEMPORAL
value: entirely
type: DEGREE
Source sentences:
text: Some pacemakers are external and temporary, not surgically implanted.
text: Although in 1950, the pacemaker was an entirely external device worn on the skin and plugged into a wall outlet, by 1958 a wearable device had been created by Earl Bakken.