Assertion: gregorian chant | /r/HasProperty | subjected to reform
Facets:
value: in its long history
type: TEMPORAL
Source sentences:
text: In its long history, Gregorian chant has been subjected to many gradual changes and some reforms.
text: In its long history, Gregorian Chant has been subjected to many gradual changes and some reforms.
text: In its long history Gregorian Chant has been subjected to many gradual changes and some reforms.