The back of a man in a black hat and coat standing in front of a large green structure.
a man in a black hat
If you can see the back of a man in a black hat, then that indicates there is a man in a black hat, it is a simpler rephrasing of the main subject matter.
exists s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(n_back(x1) & a_topic(x1) & of(x1,x2) & in(x2,x3) & in(x3,x7) & of(x7,x8) & n_structure(x8) & a_green(s3) & Theme(s3,x8) & a_large(s2) & Theme(s2,x8) & n_front(x7) & n_standing(x5) & of(x5,x6) & n_coat(x6) & n_hat(x4) & a_black(s1) & Theme(s1,x4) & subset_of(x5,x3) & subset_of(x4,x3) & n_man(x2))
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_hat(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1))