What is leading the ground?
The pipe is leading the ground.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    2
2     0  to the right of    1
3     0  to the right of   15
4     0  to the right of   13
..  ...              ...  ...
70   17  to the right of   11
71   17  to the right of    8
72   18   to the left of    4
73   18   to the left of    6
74   18  to the right of    3

[75 rows x 3 columns]