Assertion: pianist's work | /r/HasAspect | multiple composers
Facets:
Source sentences:
text: A work of music can have multiple composers, which often occurs in popular music when a band collaborates to write a song, or in musical theatre, where the songs may be written by one person, the orchestration of the accompaniment parts and writing of the overture is done by an orchestrator, and the words may be written by a third person.