Assertion: trombone's valve | /r/CapableOf | maintain trumpet
Facets:
value: properly
type: MANNER
Source sentences:
text: To correctly maintain a trumpet, the valves ought to be usually oiled not less than three occasions per week, and the instrument ought to be wiped down after every use.
text: To properly maintain a trumpet, the valves should be regularly oiled at least 3 times per week, and the instrument should be wiped down after each use.