What is in the sky?
The wire is in the sky.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of    1
2     1               on    0
3     1      in front of    2
4     1   to the left of    0
5     2               in    6
6     2           behind    1
7     2               on    3
8     3               by    2
9     4               on    1
10    4   to the left of    0
11    5               on    1