A barechested man surfs on a white surfboard.
A clothed woman sits on the beach.
A man is not a woman.  Barechested means not fully clothed.
exists s1 s2 x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_surfboard(x3) & a_white(s2) & Theme(s2,x3) & n_surf(x1) & of(x1,x2) & n_man(x2) & a_barechested(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_beach(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_woman(x1) & a_clothed(s1) & Theme(s1,x1))