Assertion: concertina's button | /r/HasProperty | to use finger
Facets:
value: on the bottom note
type: LOCATION
Source sentences:
text: When playing two successive notes in the second vertical row of either hand, the Victorian default (whether ascending or descending, and even if the notes were more than one button away from one another) was to use finger 1 on the bottom note, finger 2 on the upper note.