Assertion: bunsen burner's air hole | /r/HasProperty | covered by the collar
Facets:
value: completely
type: DEGREE
Source sentences:
text: Always light the Bunsen burner with the air holes completely covered by the collar.
text: A Bunsen burner flame will burn yellow when the air hole is completely covered by the collar.
text: • Always light the Bunsen burner with the air hole covered by the collar.