Two young blond children sit in the grass playing with sticks.
Two children are playing on a slide.
Children playing on a slide can not also sit in the grass playing with sticks.
exists e1 s1 s2 x1 x2 x3 x4.(n_playing(x2) & of(x2,x3) & n_grass(x3) & in(e1,x2) & with(x2,x4) & n_stick(x4) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & a_blond(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_slide(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_2(x1))