An old man rides a bicycle on a country road.
A man rides a bike.
A man might be considered old.  A bike and a bicycle are the same thing.
exists e1 s1 x1 x2 x3 x4.(on(e1,x3) & n_road(x3) & of(x3,x4) & n_country(x4) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_man(x1))