Are there any flags or skis?
Yes, there are skis.
    src        edge_attr  dst
0     2  to the right of   12
1     4         covering   12
2     4               on   12
3     5               of    7
4     5  to the right of    9
5     7          wearing   10
6     7          wearing    1
7     8               of    7
8     9   to the left of    5
9    12   to the left of    2
10   12       covered by    4