Assertion: button accordion | /r/HasProperty | common
Facets:
value: very
type: DEGREE
value: with some variation
type: OTHER
value: among the lower and middle classes
type: OTHER
Source sentences:
text: At first, the button accordion was too expensive to be very common among the lower and middle classes, but as it lost its novelty (around the 1860s), it became more widespread among these groups, too.
text: The two-row button accordion is very common, with some variation.  
text: At first, the button accordion was too expensive to be very common among the lower and middle classes, but as it lost its novelty (around the 1860s), it became more widespread among these groups, too.
text: The two-row button accordion is very common, with some variation.