Assertion: barbershop quartet | /r/CapableOf | sing in front of the curtain
Facets:
value: as an "olio" act
type: MANNER
Source sentences:
text: Minstrel shows often featured barbershop quartets who sang in front of the curtain while performers and stage hands prepared for the next act.
text: Minstrel shows also featured barbershop quartets, who sang in front of the curtain as an "olio" act while performers and stage hands prepared for the next act.