How long is the hair that looks dark?
The hair is long.
     src        edge_attr  dst
0      0   to the left of    2
1      0   to the left of   12
2      0   to the left of   15
3      1   to the left of   11
4      1   to the left of   12
..   ...              ...  ...
115   18   to the left of   11
116   18   to the left of   12
117   18   to the left of   10
118   18  to the right of    6
119   18  to the right of    8

[120 rows x 3 columns]