A man Rollerblades on a skate course.
The man has rollerblades.
A man who rollerblades has rollerblades.
exists e1 s1 x1 x2.(on(e1,x2) & n_course(x2) & a_skate(s1) & Theme(s1,x2) & Actor(e1,x1) & v_rollerblade(e1) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_rollerblade(x2))