A man alone on a gravely beach.
A man is alone because he has no one else.
Just because a man alone on a gravely beach does not indicate that he has no one else.
exists s1 x1 x2.(a_topic(x1) & on(x1,x2) & n_beach(x2) & a_gravely(s1) & Theme(s1,x2) & r_alone(x1) & n_man(x1))
exists p1 s1 x1.(-exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & r_else(x2) & n_one(x2)) & n_male(x1) & because(s1,p1) & Theme(s1,x1) & a_alone(s1) & n_man(x1))