Assertion: pop music's form | /r/HasProperty | the motet
Facets:
Source sentences:
text: Principal forms of sacred musical composition at the time were the mass, the motet, and the laude; secular forms included the chanson, the frottola, and later the madrigal.
text: By the end of the 12th century, a form of song called the motet arose, accompappnied by traveling musicians called jongleurs.