Some of the hair in his beard are turning grey.
He has gotten grey hairs only in the past year.
he has not necessarily gotten grey hairs only in the past year
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 s2 x1 x2 x3.(n_year(x3) & a_past(s2) & Theme(s2,x3) & n_male(x1) & r_only(e1) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_get(e1) & n_hair(x2) & a_grey(s1) & Theme(s1,x2))