Is there any door that is not green?
Yes, there is a black door.
    src        edge_attr  dst
0     0   to the left of   13
1     1   to the left of    2
2     1  to the right of   14
3     1  to the right of   11
4     1   to the left of    5
..  ...              ...  ...
76   17   to the left of   15
77   17   to the left of    9
78   19  to the right of    8
79   19  to the right of   15
80   19  to the right of    7

[81 rows x 3 columns]