Some of the hair in his beard are turning grey.
The man also has a mustache.
Having a beard does not imply the man has a mustache.
exists e1 x1 x2 x3 x4.(n_beard(x3) & of(x3,x2) & n_male(x2) & n_hair(x2) & Theme(e1,x4) & Actor(e1,x1) & v_turn(e1) & n_grey(x4) & of(x1,x2) & in(x2,x3) & n_thing(x1))
exists e1 s1 x1 x2.(n_man(x1) & a_also(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_mustache(x2))