What is this, a train or a bus?
This is a train.
     src        edge_attr  dst
0      1  to the right of   38
1      1  to the right of   27
2      1  to the right of   31
3      1  to the right of   37
4      2             near   29
..   ...              ...  ...
372   39  to the right of   23
373   39  to the right of   31
374   39  to the right of   15
375   39  to the right of   37
376   39  to the right of   27

[377 rows x 3 columns]