What is on the toilet roll?
The paper is on the toilet roll.
    src        edge_attr  dst
0     0  to the right of   18
1     0  to the right of    3
2     0   to the left of    4
3     3   to the left of    5
4     3   to the left of    6
..  ...              ...  ...
66   19   to the left of   16
67   19   to the left of    8
68   20   to the left of   16
69   20   to the left of    8
70   20   to the left of    6

[71 rows x 3 columns]