What is on the brown horse?
The snow is on the horse.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    3
2     1  to the right of    0
3     2  to the right of    9
4     2  to the right of   15
..  ...              ...  ...
56   11  to the right of    3
57   12   to the left of   11
58   14   to the left of    3
59   14               on    7
60   15   to the left of    2

[61 rows x 3 columns]