A man wrote "who are you?".
A man wrote something
A man writing "who are you?" implies that he wrote something.
exists e1 p1 x1 x2 x3.(a_topic(x1) & (x3 = x1) & n_person(x1) & (x1 = x3) & Actor(e1,x2) & v_write(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_write(e1) & n_thing(x2) & n_man(x1))