Two children slide down a slide into a ball pit while another child looks on.
Some kids are sliding into a ball pit.
"Some kids" is a rephrasing of two children.
exists e1 p1 s1 x1 x2 x3 x4.(exists e2 p2 x5.(exists s2.(Theme(s2,x5) & a_on(s2)) & Topic(e2,p2) & Actor(e2,x5) & v_look(e2) & n_child(x5) & -(x5 = x1)) & n_child(x1) & n_child(x1) & while(e1,p1) & rel(e1,x4) & n_slide(x4) & into(e1,x2) & n_pit(x2) & of(x2,x3) & n_ball(x3) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_slide(e1) & card_eq_2(x1))
exists e1 x1 x2 x3.(into(e1,x2) & n_pit(x2) & of(x2,x3) & n_ball(x3) & Actor(e1,x1) & v_slide(e1) & n_kid(x1))