Four people ride in an outdoor elevator.
A group of people ride a subway
A subway is distinct from an outdoor elevator.
exists e1 s1 x1 x2.(in(e1,x2) & n_elevator(x2) & a_outdoor(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_subway(x3) & of(x1,x2) & n_people(x2) & n_group(x1))