A skateboarder practicing a trick on his board.
He is sitting on a small cat.
One cannot sit and practice trick on a skateboard simultaneously.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_board(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_practice(e1) & n_trick(x3) & (x1 = x2) & n_skateboarder(x1))
exists e1 s1 x1.(on(e1,x1) & n_cat(x1) & a_small(s1) & Theme(s1,x1) & Actor(e1,x1) & v_sit(e1) & n_male(x1))