Is this a truck or a bus?
This is a bus.
    src        edge_attr  dst
0     1   to the left of   23
1     1   to the left of    7
2     1   to the left of   22
3     1   to the left of   11
4     2  to the right of    4
..  ...              ...  ...
64   23  to the right of    1
65   23  to the right of    7
66   23   to the left of   11
67   23  to the right of   20
68   23  to the right of   22

[69 rows x 3 columns]