What are the wild horses doing?
The horses are standing.
    src        edge_attr  dst
0     0  to the right of    8
1     1   to the left of   11
2     1  to the right of    2
3     2   to the left of    1
4     6  to the right of   13
5     6  to the right of   12
6     8   to the left of    0
7     9   to the left of   10
8    10  to the right of    9
9    11           behind   13
10   11  to the right of    1
11   12               in    7
12   12   to the left of    6
13   13   to the left of    6
14   13      in front of   11