An elderly man looks down and smiles.
An elderly man is looking downwards with a happy expression.
To say that the man looks down and smiles shows introspection, while looking downwards with a happy expression could mean simply something amusing.
exists e1 e2 p1 s1 s2 x1 x2.(Actor(e2,x2) & v_smile(e2) & n_man(x2) & a_elderly(s2) & Theme(s2,x2) & exists s3.(Theme(s3,x1) & a_down(s3)) & Topic(e1,p1) & Actor(e1,x1) & v_look(e1) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))
exists p1 s1 x1.(exists e1 s2 x2 x3.((x1 = x2) & with(x2,x3) & n_expression(x3) & a_happy(s2) & Theme(s2,x3) & n_downward(x2) & Actor(e1,x2) & v_look(e1)) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))