Assertion: reed's pitch | /r/HasProperty | tuned with a blob of wax
Facets:
value: often
type: TEMPORAL
value: further
type: DEGREE
Source sentences:
text: Each pipe has one reed (of palm bark, bamboo or more commonly of a brass or bronze alloy), its pitch being determined by the shape of the reed and often further tuned with a blob of wax added to weight the tip of the reed.