A boy doing a skateboard trick
The boy has a fast skateboard.
We do not know if the skateboard is fast, only that it is capable of performing tricks on
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & of(x3,x4) & n_skateboard(x4) & (x1 = x2) & n_boy(x1))
exists e1 s1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_skateboard(x2) & a_fast(s1) & Theme(s1,x2))