The boy is doing a trick on a rail next to an overpass.
A boy is doing a trick just after the train passes on the railroad tracks.
It is not sure the whether the train passes or not
exists e1 x1 x2 x3 x4 x5.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x3) & to(x4,x5) & n_overpass(x5) & next(x3,x4) & n_thing(x4) & n_rail(x3) & n_trick(x2))
exists e1 p1 x1 x2 x3 x4 x5.(n_track(x4) & of(x4,x5) & n_railroad(x5) & n_train(x3) & r_just(e1) & exists e2.(on(e2,x4) & Actor(e2,x3) & v_pass(e2)) & after(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_boy(x1))