Assertion: accordion's button | /r/CapableOf | play chord
Facets:
Source sentences:
text: The garmons can be of two major classes: unisonoric, meaning that each button plays the same note or chord when the bellows is being expanded as it does when compressed, and bisonoric, in which the note depends on the direction of the bellowswork.
text: This means that the buttons play chords (combinations of notes that sound good together).