A barechested man surfs on a white surfboard.
A barechested man surfs.
A man that surfs surfs irrespective of the color of the board.
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 s1 x1 x2.(a_topic(x1) & n_surf(x1) & of(x1,x2) & n_man(x2) & a_barechested(s1) & Theme(s1,x1))