What color is that sky?
The sky is gray.
    src        edge_attr  dst
0     0  to the right of    6
1     0   to the left of   15
2     0  to the right of   11
3     0   to the left of   12
4     0   to the left of   10
..  ...              ...  ...
63   18  to the right of    6
64   20   to the left of   13
65   20        on top of   14
66   20   to the left of    7
67   20  to the right of    0

[68 rows x 3 columns]