A person in a plaid shirt riding a skateboard on a half-pipe.
The person is riding his motorcycle.
The person cannot be riding his motorcycle and his skateboard.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & on(e1,x5) & n_half-pipe(x5) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_skateboard(x4) & (x2 = x3) & n_shirt(x2) & a_plaid(s1) & Theme(s1,x2) & n_person(x1))
exists e1 x1 x2.(n_motorcycle(x2) & of(x2,x1) & n_male(x1) & n_person(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))