Assertion: piece's author | /r/HasProperty | single
Facets:
Source sentences:
text: Although a musical composition often uses musical notation and has a single author, this is not always the case.
text: Although a musical composition often uses musical notation and has a single author, this is not always the case.
text: Although a musical composition often uses musical notation and has a single author, this is not always the case.
text: Although a musical composition often has a single author, this is not always the case.