Three young children play tug-of-war.
The kids are playing jumprope.
One cant be playing jumprope and tug-of-war simultaneously.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tug-of-war(x2) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2.(n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_jumprope(x2))