Three police cars are needed to apprehend a suspect.
the police cars are not needed
There can be either three or more police cars
exists e1 p1 x1 x2.(Recipient(e1,p1) & Topic(e1,x1) & v_need(e1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_apprehend(e2) & n_suspect(x3)) & n_car(x1) & of(x1,x2) & n_police(x2) & card_eq_3(x1))
exists x1 x2.(n_car(x1) & of(x1,x2) & n_police(x2) & -exists e1.(Theme(e1,x1) & v_need(e1)))