What is pulled by the horse on the right?
The wagon is pulled by the horse.
    src        edge_attr  dst
0     0          pulling    6
1     0  to the right of    6
2     0   to the left of    3
3     0  to the right of   18
4     1   to the left of   13
..  ...              ...  ...
90   18   to the left of    0
91   19   to the left of   11
92   19   to the left of    6
93   19   to the left of   10
94   19   to the left of    7

[95 rows x 3 columns]