Assertion: tuba's valve | /r/CapableOf | lower the pitch of a bb♭ tuba
Facets:
value: by three semitones
type: OTHER
Source sentences:
text: The third valve is long enough to lower the pitch of a BB♭ tuba by three semitones, but it is not long enough to lower the pitch of an A♭ tuba by three semitones.