Three children are posing on a playground slide.
Three friends sit on a slide in school playground.
A playground slide is not necessarily in a school playground and children are not necessarily friends.
exists e1 s1 x1 x2.(on(e1,x2) & n_slide(x2) & a_playground(s1) & Theme(s1,x2) & Actor(e1,x1) & v_pose(e1) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4.(on(e1,x2) & in(x2,x3) & n_playground(x3) & of(x3,x4) & n_school(x4) & n_slide(x2) & Actor(e1,x1) & v_sit(e1) & n_friend(x1) & card_eq_3(x1))