Assertion: accordion's bellow | /r/HasProperty | pumped
Facets:
Source sentences:
text: The press of a button or key opens a valve to allow air to pass through the reed or reeds to make a sound when the bellows are pumped in or out.
text: The press of a button or key opens a valve to allow air to pass through the reed or reeds to make a sound when the bellows are pumped in or out.