What is the vehicle to the right of the animal that is pulling a cart?
The vehicle is a bus.
    src        edge_attr  dst
0     0   to the left of   16
1     0   to the left of   10
2     0   to the left of    1
3     0        pulled by    4
4     1  to the right of    7
..  ...              ...  ...
59   19  to the right of   17
60   19  to the right of    7
61   20  to the right of    2
62   20  to the right of   19
63   20  to the right of   10

[64 rows x 3 columns]