What is the train in front of?
The train is in front of the trees.
     src        edge_attr  dst
0      1   to the left of   10
1      1   to the left of   11
2      1   to the left of   12
3      1   to the left of   13
4      1  to the right of   14
..   ...              ...  ...
201   23   to the left of   13
202   24   to the left of    5
203   24  to the right of   14
204   24   to the left of   20
205   24  to the right of   21

[206 rows x 3 columns]