What is pulled by the horse?
The cart is pulled by the horse.
    src        edge_attr  dst
0     0  to the right of    9
1     0  to the right of    7
2     1             near   15
3     1   to the left of    3
4     2   to the left of   13
..  ...              ...  ...
81   18   to the left of   14
82   19   to the left of   18
83   19   to the left of    2
84   19   to the left of   12
85   19   to the left of   14

[86 rows x 3 columns]