Assertion: balloon | /r/CapableOf | push the air
Facets:
Source sentences:
text: That is, the balloon pushes the air back, and that pushes the car with equal force in the opposite direction.
text: A balloon powered car is moves because the balloon pushes out air.
text: The bigger balloons move farther because they can push more air.
text: The air pushes against the balloon, causing it to expand, but the balloon is also pushing back on the air.