Assertion: backdoor cold front | /r/HasProperty | shallow
Facets:
value: generally
type: DEGREE
value: in nature
type: LOCATION
value: with much
type: DEGREE
Source sentences:
text: Backdoor cold fronts are generally shallow in nature, with much of the colder, maritime air only extending a few thousand feet above the surface and therefore often have a very difficult time passing over the mountains.