Two soccer players on a soccer field.
Two people are playing soccer.
Two soccer players on a soccer field doesn't mean they are playing soccer.
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x3) & n_field(x3) & of(x3,x4) & n_soccer(x4) & n_player(x1) & of(x1,x2) & n_soccer(x2) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2) & n_people(x1) & card_eq_2(x1))