Assertion: electric organ's feature | /r/CapableOf | allow sustained notes
Facets:
value: to have gradual vibrato
type: PURPOSE
Source sentences:
text: Vibra-Magic - This innovative feature allowed sustained notes to have gradual vibrato added, again at a setting that could be determined by the organist.
text: This innovative feature allowed sustained notes to have gradual vibrato added, again at a setting that could be determined by the organist.