Is the sky gray or orange?
The sky is gray.
    src        edge_attr  dst
0     0  to the right of    6
1     3               on    6
2     5   to the left of    6
3     5               on    1
4     5     hanging from    1
5     6   to the left of    0
6     6  to the right of    5
7     6   to the left of   13
8     8               on    9
9     9               on    6
10   13  to the right of    6