Assertion: concertina's keyboard layout | /r/CapableOf | play scale passages of single notes
Facets:
Source sentences:
text: These keyboard layouts are not structured to make it easy to play scale passages of single notes: they were originally laid out to facilitate playing chords, for supporting singers of religious music in small churches with no organ or harmonium, or for clergy requiring a portable instrument (missionaries, traveling evangelists, army and navy chaplains, and so forth).