What is the food on the tray that is in the center?
The food is cheese.
    src        edge_attr  dst
0     1   to the left of    2
1     1  to the right of   15
2     1   to the left of    8
3     1   to the left of   17
4     1   to the left of   16
..  ...              ...  ...
90   22   to the left of   20
91   22   to the left of   23
92   22   to the left of   15
93   23  to the right of   22
94   23   to the left of   14

[95 rows x 3 columns]