What is pulled by the animal on the left?
The wagon is pulled by the horse.
    src        edge_attr  dst
0     0  to the right of   13
1     0  to the right of   10
2     0  to the right of   15
3     0   to the left of    2
4     0   to the left of    1
..  ...              ...  ...
93   15   to the left of    0
94   15  to the right of   11
95   15  to the right of   10
96   15  to the right of    9
97   15   to the left of   13

[98 rows x 3 columns]