Assertion: piano's keyboard | /r/HasProperty | shorter than 88 keys
Facets:
Source sentences:
text: This works well for 88-key pianos, but as we said, many keyboards on organs, synthesizers, and electronic pianos are shorter than 88 keys, so unless one remembers that Middle C is C-40, and unless one can count both downwards and upwards from C easily, this system becomes confusing as well.