Is the tray to the right or to the left of the food that is in the bottom of the picture?
The tray is to the left of the food.
    src        edge_attr  dst
0     0  to the right of   21
1     0  to the right of    7
2     0  to the right of    5
3     0  to the right of   16
4     0  to the right of   13
..  ...              ...  ...
82   21   to the left of    9
83   21   to the left of    6
84   21   to the left of    1
85   21   to the left of    3
86   21   to the left of    0

[87 rows x 3 columns]