Assertion: reed | /r/AtLocation | the instrument
Facets:
value: generally
type: MANNER
value: beneath the keyboard
type: LOCATION
Source sentences:
text: In all these forms, moreover, the agitation of the reeds is produced by means of more dense or compressed air forced out of a bellows across the reeds, and acting of course against the ordinary atmospheric pressure on the opposite side; and generally the reeds themselves are placed low in the instrument, often beneath the keyboard, so that the sound is liable to be somewhat smothered or interfered with.