Assertion: piano's keyboard | /r/CapableOf | remain the same
Facets:
value: since around 1450
type: TEMPORAL
value: respectively
type: MANNER
value: virtually
type: MANNER
Source sentences:
text: Since around 1450 the keyboard has remained virtually the same except for minor variations in the width of the keys and the coverings of the short and long keys respectively as white and black or black and white.