How long is the horse's tail?
The tail is short.
    src        edge_attr  dst
0     0  to the right of    3
1     1  to the right of    7
2     1  to the right of   11
3     1  to the right of   15
4     1  to the right of   13
..  ...              ...  ...
69   16   to the left of    7
70   16   to the left of   10
71   16   to the left of   13
72   16  to the right of    8
73   16   to the left of   15

[74 rows x 3 columns]