Boy skating across a metal rail.
The boy is outdoors skating.
both subjects are skating
exists e1 x1 x2 x3.(ne_nam_boy(x1) & across(e1,x2) & n_rail(x2) & of(x2,x3) & n_metal(x3) & Actor(e1,x1) & v_skate(e1))
exists p1 x1.(n_boy(x1) & exists e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_skate(e1) & (x2 = x3) & n_outdoors(x2)))