Assertion: smog | /r/CreatedBy | inversion
Facets:
value: commonly
type: DEGREE
Source sentences:
text: Commonly, smog is caused by an inversion, in which cool air presses down on a column of warm air, forcing the air to remain stationary.
text: Commonly, smog is caused by an inversion, in which cool air presses down on a column of warm air, forcing the air to remain stationary.