Young girls are practicing dance.
Young girls are playing football.
Girls playing football contradicts with girls practicing dance.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_practice(e1) & n_dance(x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_football(x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))