What color is the tail?
The tail is green.
    src        edge_attr  dst
0     0               on   14
1     0   to the left of    4
2     0   to the left of    3
3     1   to the left of    4
4     1   to the left of    3
..  ...              ...  ...
60   18   to the left of    7
61   18  to the right of    2
62   18  to the right of    3
63   19  to the right of    3
64   19   to the left of    7

[65 rows x 3 columns]