Assertion: tuba's valve | /r/ObjectUse | used as means
Facets:
value: primarily
type: DEGREE
value: originally
type: OTHER
Source sentences:
text: Valves were originally used primarily as a means to play in different keys without crooks, not for harmonic playing.
text: Valves were originally used primarily as a means to play in different keys without crooks, not for harmonic playing.