A man on a bike that is doing a trick.
a man on a bike
he is doing a trick on his bike
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_trick(x4) & (x2 = x3) & n_bike(x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_bike(x2) & n_man(x1))