Assertion: orchestra's part | /r/CapableOf | sing text
Facets:
Source sentences:
text: At the beginning of the 13th century, it was replaced by the choir book—a large manuscript in which soprano and alto parts usually faced each other on the upper halves of two opposite pages, with the tenor and bass parts occupying the lower halves (an economical arrangement because the upper parts, which sang the texts, required more space than the slow-moving lower parts).