A skateboarder shows off his skills.
A skateboarder rides
the skateboarder has sills to impress
exists e1 s1 x1 x2.(a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_show(e1) & n_skill(x2) & of(x2,x1) & n_male(x1) & n_skateboarder(x1))
exists x1 x2.(a_topic(x1) & n_ride(x1) & of(x1,x2) & n_skateboarder(x2))