Assertion: streetcar | /r/CapableOf | use mule
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: These streetcars used horses and sometimes mules.
text: These trams were an animal railway, usually using horses and sometimes mules to haul the cars, usually two as a team.
text: The earliest streetcars used horses and sometimes mules, usually two as a team, to haul the cars.