Assertion: cold front's air | /r/HasProperty | modified by warm ground
Facets:
Source sentences:
text: Two distinct lines of convection develop throughout the course of the animation - one along and just ahead of the first cold front (which in this case, has properties making it appear similar to a dryline - this previously cooler air came from the Pacific but has been modified by downsloping, warm ground and solar insolation), and another along a secondary cold front that trails it.