A man with brown hair is playing a guitar.
the man has brown hair
These actually seem the same - both use "man" and both indicate that the man has brown hair.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_guitar(x3) & with(x1,x2) & n_hair(x2) & a_brown(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_brown(e1) & n_hair(x2))