What are the carts in front of?
The carts are in front of the store.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    1
2     0   to the left of   17
3     0   to the left of   20
4     0   to the left of    3
..  ...              ...  ...
72   20  to the right of    0
73   20  to the right of   18
74   20   to the left of    1
75   20   to the left of   13
76   20   to the left of    7

[77 rows x 3 columns]