Assertion: clarinet's instrument | /r/CapableOf | become outfitted
Facets:
value: with several keys
type: OTHER
Source sentences:
text: The Classical period brought a regular oboe whose bore was gradually narrowed, and the instrument became outfitted with several keys, among them those for the notes D♯, F, and G♯. A key similar to the modern octave key was also added called the "slur key", though it was at first used more like the "flick" keys on the modern German bassoon.