What is the gravy on?
The gravy is on the tray.
    src        edge_attr  dst
0     0  to the right of   14
1     0   to the left of    7
2     0               on    5
3     0  to the right of    1
4     1   to the left of    0
5     1  to the right of   15
6     1   to the left of    7
7     1  to the right of   12
8     1   to the left of   14
9     1   to the left of   13
10    2   to the left of   11
11    2   to the left of    4
12    2   to the left of   16
13    2   to the left of    9
14    3  to the right of    9
15    4  to the right of    2
16    6               on    5
17    7               on   14
18    7  to the right of   14
19    7  to the right of    1
20    7  to the right of    0
21    8               on    5
22    9   to the left of    3
23    9  to the right of    2
24   11               on   10
25   11  to the right of    2
26   12   to the left of    1
27   13  to the right of   14
28   13  to the right of    1
29   14       wrapped in    7
30   14               on    5
31   14   to the left of    0
32   14   to the left of    7
33   14  to the right of    1
34   14  to the right of   15
35   14   to the left of   13
36   15   to the left of    1
37   15               on    5
38   15               on   12
39   15   to the left of   14
40   16               in    9
41   16  to the right of    2