Assertion: piano's key | /r/DefinedAs | the number of sharps
Facets:
value: in the key signature
type: LOCATION
Source sentences:
text: Different keys are defined by the number of sharps in the key signature, also proceeding from left to right; for example, if only the first four sharps are used, the key is E major/C ♯ minor, and the corresponding pitches are raised.