Two people look over a terrace wall.
Two people are standing.
Being over a terrace wall does not necessarily imply standing.
exists e1 x1 x2 x3.(over(e1,x2) & n_wall(x2) & of(x2,x3) & n_terrace(x3) & Actor(e1,x1) & v_look(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_stand(e1) & n_people(x1) & card_eq_2(x1))