What is the train in front of?
The train is in front of the table.
    src       edge_attr  dst
0     1  to the left of   19
1     1  to the left of   18
2     1  to the left of   11
3     1  to the left of   17
4     1  to the left of    2
..  ...             ...  ...
56   22  to the left of   11
57   22  to the left of    2
58   23  to the left of   11
59   23  to the left of   18
60   23  to the left of   17

[61 rows x 3 columns]