the class of operating mode models of air
the air involved
(Forall (?Self ?Air-Involved) (<=> (And (= (Air-Involved ?Self) ?Air-Involved) (Air-Operating-Mode ?Self)) (And (Operating-Mode-Model ?Self) (Air ?Air-Involved)))) (Forall (?Self ?Time) (<=> (Active ?Time Air-Operating-Mode ?Self) (And (Air-Operating-Mode ?Self) (Active ?Time Operating-Mode-Model ?Self))))