What food is on the tray?
The food is a sausage.
    src        edge_attr  dst
0     0  to the right of    5
1     1   to the left of    2
2     1   to the left of    6
3     1   to the left of    3
4     2   to the left of    3
5     2  to the right of    1
6     2   to the left of    6
7     3  to the right of    7
8     3  to the right of    6
9     3  to the right of    1
10    3  to the right of    2
11    3               on    2
12    4               on    8
13    5               on    8
14    5   to the left of    0
15    6  to the right of    1
16    6  to the right of    2
17    6   to the left of    3
18    7               on    8
19    7   to the left of    3