Assertion: concerto's composition | /r/HasProperty | easy parts
Facets:
Source sentences:
text: The church of San Petronio in Bologna, for instance, maintained a small orchestra of expert instrumentalists; when large numbers of extra players were brought in for special occasions, the contrast between the modest technique of the outsiders and the accomplished virtuosity of the regular performers strongly suggested writing that could take advantage of the situation by providing an appropriately different kind of music for each group within the framework of a single composition -- easy parts for the ripieno, more difficult parts for the soloists when heard alone.