Two football (soccer) players play at night.
two musicians practice their instruments
football players is contradictory to musicians
exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & at(x1,x5) & n_night(x5) & ((x1,x3) & n_player(x3) & a_)(s1) & Theme(s1,x3) & of(x3,x4) & n_soccer(x4) & n_play(x1) & of(x1,x2) & n_football(x2) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_practice(e1) & n_instrument(x2) & of(x2,x1) & n_thing(x1) & n_musician(x1) & card_eq_2(x1))