Assertion: lung | /r/CapableOf | act like a pair of bellows
Facets:
Source sentences:
text: They also understood that breathing occurred in the lungs, in essence, that the lungs acted like a pair of bellows firing and cooling a furnace.
text: The lungs function as a pair of bellows, pulling in fresh air into the body when they expand, and expelling the impure air when they compress.