Assertion: orchestra's performance | /r/HasProperty | kept
Facets:
value: in other cases
type: TEMPORAL
value: by slapping a roll of paper
type: MANNER
value: together
type: MANNER
Source sentences:
text: As early as the 15th century, performances by the Sistine Choir in the Vatican were kept together by slapping a roll of paper (or in other cases, a lengthy pole, or baton) to maintain an audible beat.