Assertion: cold front's air | /r/CapableOf | push underneath warmer air
Facets:
value: at the surface
type: LOCATION
Source sentences:
text: The presence of a cold front means that cold air is advancing and pushing underneath warmer air.
text: The presence of a cold front means that cold air is advancing and pushing underneath warmer air.
text: A cold front indicates that cold air is advancing and pushing underneath warmer air at the surface.