A man in an orange vest is riding on an escalator.
A man is riding on an escalator and wearing an orange vest.
Man in an orange vest  is the same as a man wearing an orange vest
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_escalator(x4) & Actor(e1,x1) & v_ride(e1) & in(x1,x2) & n_vest(x2) & of(x2,x3) & n_orange(x3) & n_man(x1))
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x4) & Actor(e2,x3) & v_wear(e2) & n_vest(x4) & of(x4,x5) & n_orange(x5) & n_man(x3) & on(e1,x2) & n_escalator(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1))