What is the ladder on?
The ladder is on the bus.
     src        edge_attr  dst
0      0  to the right of    1
1      0  to the right of    5
2      0  to the right of    2
3      1  to the right of    2
4      1   to the left of    0
..   ...              ...  ...
106   23   to the left of    9
107   23  to the right of   17
108   23  to the right of   18
109   23  to the right of   13
110   23  to the right of   19

[111 rows x 3 columns]