boy doing tricks on a skateboard
The boy displays his skills.
The boy is showing his  tricks on a skateboard
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_skateboard(x4) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(n_skill(x2) & of(x2,x1) & n_male(x1) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_display(e1))