Assertion: tuba's valve | /r/AtLocation | their advantage
Facets:
value: greatly
type: DEGREE
Source sentences:
text: There have also been many improvements in mechanism, such as the Boehm flute; valves have been added to horns and trumpets—greatly to their advantage, but despite the inventive genius which has been directed toward the subject of orchestral instruments, no essentially new form of tone-producing device has been evolved.