A person is riding a green motorcycle.
The man is riding his motorcycle on a country road.
The person is not necessarily a man and he is not necessarily riding on a country road
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & a_green(s1) & Theme(s1,x2) & n_person(x1))
exists e1 x1 x2 x3 x4.(n_motorcycle(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & on(e1,x3) & n_road(x3) & of(x3,x4) & n_country(x4) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))