A boy is doing a skateboard trick on the railing of the steps.
a boy does a skateboard trick
Doing a skateboard trick is the same as does a skateboard trick.
exists e1 x1 x2 x3 x4 x5.(n_step(x5) & n_railing(x4) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x4) & of(x4,x5) & n_trick(x2) & of(x2,x3) & n_skateboard(x3) & n_boy(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & of(x2,x3) & n_skateboard(x3) & n_boy(x1))