Are there any skiers or skis in the picture?
Yes, there are skis.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    3
2     0   to the left of    9
3     2  to the right of    0
4     2   to the left of    3
5     3  to the right of    2
6     3  to the right of    0
7     4   to the left of   10
8     7   to the left of   10
9     9  to the right of    0
10   10  to the right of    4
11   10  to the right of    7