Are there any fences or umbrellas?
Yes, there is a fence.
   src        edge_attr  dst
0    0          hitting    4
1    0         swinging    2
2    0   to the left of    4
3    0   to the left of    2
4    2  to the right of    3
5    2  to the right of    0
6    3   to the left of    2
7    3  to the right of    5
8    4  to the right of    0
9    5   to the left of    3