Assertion: cold front's air | /r/CapableOf | rise up in the case of a warm front
Facets:
value: ahead of the front
type: TEMPORAL
Source sentences:
text: In the case of a warm front, the warm, less dense air rises up and over the colder air ahead of the front.
text: In the case of a warm front, the warm, less dense air rises up and over the colder air ahead of the front.