Assertion: libretto's word | /r/HasProperty | set to music
Facets:
value: to make an opera
type: PURPOSE
value: in operetta
type: OTHER
value: in an opera
type: LOCATION
Source sentences:
text: A libretto is the text (the words) which are set to music to make an opera.
text: librettist (author of words to be set to music in an opera or operetta)
text: A libretto is the text (the words) which are set to music to make an opera.
text: A libretto is the text (the words) which are set to music to make an opera.