A policeman stands in front of an SUV.
the man is a stat police
Not all policeman is a stat police.
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & ne_org_suv(x3) & n_front(x2) & Actor(e1,x1) & v_stand(e1) & n_policeman(x1))
exists p1 x1.(n_man(x1) & exists x2 x3.((x1 = x2) & n_police(x2) & of(x2,x3) & n_stat(x3)))