What is this, a train or a truck?
This is a truck.
     src        edge_attr  dst
0      0  to the right of    5
1      0  to the right of    2
2      0  to the right of   25
3      1   to the left of   18
4      1   to the left of   17
..   ...              ...  ...
154   27   to the left of   23
155   27   to the left of   17
156   27   to the left of   18
157   27   to the left of   24
158   27   to the left of   26

[159 rows x 3 columns]