Is the horse on the left or on the right?
The horse is on the right of the image.
   src        edge_attr  dst
0    0  to the right of    9
1    2               on    7
2    8   to the left of   10
3    9   to the left of    0
4   10  to the right of    8
5   10          wearing    3
6   11               on   12