Are there windows in the picture?
Yes, there are windows.
    src        edge_attr  dst
0     0  to the right of   18
1     1   to the left of   21
2     1   to the left of    3
3     1  to the right of   17
4     2   to the left of   11
..  ...              ...  ...
73   19   to the left of   17
74   21  to the right of   11
75   21  to the right of    1
76   21  to the right of    3
77   21  to the right of    4

[78 rows x 3 columns]