One child pushes another on a swing in a playground.
The children are on a slide.
A swing is not a slide, and there has to either be a child or children.
exists e1 x1 x2 x3 x4.(on(e1,x3) & in(x3,x4) & n_playground(x4) & n_swing(x3) & Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_thing(x2) & n_child(x1) & card_eq_1(x1))
exists p1 x1.(n_child(x1) & exists x2.(on(x1,x2) & n_slide(x2)))