a man on a race bike
A bike racer completing his final lap to win a race.
A man on a race bike is not necessarily a bike racer.  Being on a race bike does not imply he is completing his final lap to win a race.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_bike(x2) & of(x2,x3) & n_race(x3) & n_man(x1))
exists e1 p1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Topic(e1,p1) & exists e2 x6.(Theme(e2,x6) & Actor(e2,x3) & v_win(e2) & n_race(x6)) & Theme(e1,x5) & Actor(e1,x4) & v_complete(e1) & n_lap(x5) & a_final(s1) & Theme(s1,x5) & of(x5,x1) & n_male(x1) & (x1 = x4) & (x1 = x3) & n_racer(x1) & of(x1,x2) & n_bike(x2))