Assertion: modern piano | /r/CapableOf | add 30 more keys
Facets:
value: to the instrument
type: TRANSITIVE-OBJECT
Source sentences:
text: They featured an octave range larger than the earlier fortepiano instrument, adding around 30 more keys to the instrument, which extended the deep bass range and the high treble range.
text: They featured an octave range larger than the earlier fortepiano instrument, adding around 30 more keys to the instrument, which extended the deep bass range and the high treble range.