Is this a train or a bus?
This is a bus.
     src        edge_attr  dst
0      0  to the right of   30
1      0               of   24
2      0  to the right of   14
3      0  to the right of   29
4      2   to the left of   13
..   ...              ...  ...
128   32   to the left of   17
129   32   to the left of   16
130   32   to the left of    7
131   32   to the left of   28
132   32   to the left of   21

[133 rows x 3 columns]