What food is to the left of the salt shaker?
The food is a biscuit.
    src        edge_attr  dst
0     0   to the left of   16
1     0   to the left of    1
2     0   to the left of    9
3     1  to the right of    4
4     1  to the right of   15
..  ...              ...  ...
62   17   to the left of    9
63   17  to the right of   14
64   17   to the left of    1
65   17               on    0
66   17  to the right of    7

[67 rows x 3 columns]