The man in the black hat is sitting on the floor beside the green door.
A man is sitting by the front door.
The man is sitting beside the green door and it need not be the front door.
exists e1 s1 s2 x1 x2 x3 x4.(n_door(x4) & a_green(s2) & Theme(s2,x4) & n_floor(x3) & n_hat(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1) & beside(e1,x4) & on(e1,x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2))
exists e1 s1 x1 x2.(n_door(x2) & a_front(s1) & Theme(s1,x2) & by(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))