A child in a green and white top sits on a railing.
A skateboarder is sliding down a railing.
There can be either a child who sits on a railing or a skateboarder sliding down a railing.
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_railing(x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_top(x2) & a_white(s2) & Theme(s2,x2) & a_green(s1) & Theme(s1,x2) & n_child(x1))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & n_railing(x2) & n_skateboarder(x1))