Assertion: accordion | /r/HasProperty | single
Facets:
Source sentences:
text: { menuId : "accordion", linkIdToMenuHtml : null, expand : "single",
text: Some accordions, including the earliest ones, are “single-action,” in which the paired reeds sound adjacent notes of the diatonic (seven-note) scale, so that a button will give, for instance, G on the press and A on the draw.