Man rollerskating in park.
The man is althletic.
Man rollerskating in park does not always mean that he is althletic.
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_park(x3) & n_rollerskating(x1) & of(x1,x2) & n_man(x2))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_althletic(s1))