Assertion: concertina's range | /r/HasAspect | only one or two rows of basses
Facets:
Source sentences:
text: The size and weight of an accordion varies depending on its type, layout and playing range, which can be as small as to have only one or two rows of basses and a single octave on the right-hand manual, to the standard 120-bass accordion and through to large and heavy 160-bass free-bass converter models.