Assertion: ballad | /r/CapableOf | undergo major shifts
Facets:
value: in content
type: OTHER
value: differs,
type: OTHER
value: the answer to
type: OTHER
value: in form
type: OTHER
value: throughout its centuries-long history
type: TEMPORAL
Source sentences:
text: As the ballad has undergone major shifts in form and content throughout its centuries-long history, the answer to why poets write ballads question differs, primarily based on the era in which a ballad was written.