A man on a blue motorcycle.
A man on a motorcycle is headed to the park.
The man is not necessarily headed to the park.
exists s1 x1 x2.(a_topic(x1) & on(x1,x2) & n_motorcycle(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(n_park(x3) & to(e1,x3) & Theme(e1,x1) & v_head(e1) & on(x1,x2) & n_motorcycle(x2) & n_man(x1))