Assertion: curtain | /r/HasProperty | moved
Facets:
value: during a performance
type: TEMPORAL
Source sentences:
text: When a drape is flown, the task of adjusting its height for best masking effect is simplified and, in the case of a drape that must be moved during a performance, this enables the drape to be quickly raised above the proscenium arch—thus positioning it out of view of spectators—or lowered to any desired height above the stage.