Assertion: button accordion | /r/HasProperty | a type of accordion
Facets:
Source sentences:
text: A button accordion, as the name suggests, is a type of accordion on which the treble side or the melody side of the board consists of buttons rather than piano keys.
text: A button accordion is a type of accordion on which the melody-side keyboard consists of a series of buttons.
text: A button accordion is a type of accordion on which the melody-side keyboard consists of a series of buttons.