What is the ladder on?
The ladder is on the roof.
    src        edge_attr  dst
0     0   to the left of   15
1     0   to the left of   10
2     0  to the right of   22
3     0   to the left of    3
4     0   to the left of    2
..  ...              ...  ...
74   21  to the right of   11
75   22   to the left of    0
76   22   to the left of    2
77   22   to the left of   15
78   22   to the left of    4

[79 rows x 3 columns]