Assertion: cello's back | /r/HasProperty | crafted of variable thickness
Facets:
value: from willow
type: LOCATION
value: most commonly
type: DEGREE
value: from maple
type: OTHER
value: from poplar
type: LOCATION
Source sentences:
text: Similarly of a variable thickness, the back is most commonly crafted from maple (poplar and willow were used for some baroque instruments).