Assertion: violin's string | /r/HasProperty | added
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: The normal tuning—E{sub prime}, A{sub prime}, D{sub prime}, G—means that the bass cannot descend an octave below the cello’s bottom string, and it is for this reason that a low fifth string is sometimes added, tuned to B{sub prime} or C{sub