Do you see trains or cars?
Yes, there is a train.
     src        edge_attr  dst
0      0  to the right of   12
1      1  to the right of   13
2      1  to the right of   22
3      1  to the right of   21
4      1   to the left of   16
..   ...              ...  ...
170   25  to the right of   13
171   26  to the right of   15
172   26  to the right of   12
173   26   to the left of   16
174   26   to the left of    9

[175 rows x 3 columns]