Do you see any carts to the right of the box on the right side?
No, the cart is to the left of the box.
     src        edge_attr  dst
0      0  to the right of    9
1      0  to the right of    4
2      1   to the left of   15
3      1   to the left of   16
4      1   to the left of   17
..   ...              ...  ...
120   18   to the left of   17
121   18  to the right of   16
122   18  to the right of    7
123   18  to the right of    8
124   18  to the right of    1

[125 rows x 3 columns]