Assertion: gregorian chant | /r/HasProperty | a variety of plainsong
Facets:
Source sentences:
text: Gregorian chant is a variety of plainsong named after Pope Gregory
text: Gregorian Chant is a variety of plainchant, although the two terms are often incorrectly referred to as synonymous.
text: Gregorian chant and others were various forms of plainsong which were all monophonic.