two people sit on a bench.
two sunbathers relax
Two people who sit on a bench does not necessarily imply sunbathers relax.
exists e1 x1 x2.(on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_relax(e1) & n_sunbather(x1) & card_eq_2(x1))