How long is the dark hair?
The hair is short.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of    1
2     1  to the right of    0
3     1   to the left of   15
4     2  to the right of   17
..  ...              ...  ...
65   16  to the right of   12
66   17   to the left of    2
67   17   to the left of    3
68   17   to the left of   12
69   17   to the left of    9

[70 rows x 3 columns]