Assertion: ballad | /r/HasProperty | easy
Facets:
value: because of their rhyme
type: CAUSE
value: to set a ballad
type: PURPOSE
value: because of rhythm
type: CAUSE
value: very
type: DEGREE
Source sentences:
text: It is very easy to set a ballad to music and sing it.
text: They are easy to remember because of their rhyme and rhythm.