What is on the shelf?
The grapes are on the shelf.
    src        edge_attr  dst
0     0               in   12
1     0   to the left of   18
2     0               in    5
3     0  to the right of    2
4     1   to the left of    5
5     2   to the left of    5
6     2   to the left of   10
7     2   to the left of   17
8     2   to the left of   11
9     2   to the left of    0
10    2   to the left of   14
11    2   to the left of   12
12    3  to the right of   19
13    4   to the left of    7
14    5  to the right of    1
15    5  to the right of   12
16    5  to the right of    2
17    5   to the left of   13
18    5   to the left of   18
19    6   to the left of    9
20    7  to the right of    4
21    7  to the right of    8
22    8   to the left of    7
23    9  to the right of    6
24   10  to the right of    2
25   11  to the right of    2
26   11   to the left of   18
27   12   to the left of   13
28   12   to the left of   18
29   12   to the left of    5
30   12  to the right of    2
31   12   to the left of   15
32   13               on   15
33   13  to the right of   12
34   13  to the right of    5
35   14  to the right of    2
36   14   to the left of   21
37   14   to the left of   16
38   15  to the right of   12
39   16  to the right of   14
40   17  to the right of    2
41   18  to the right of   12
42   18               on   15
43   18  to the right of   11
44   18  to the right of    5
45   18  to the right of    0
46   19   to the left of   21
47   19               on   15
48   19   to the left of    3
49   21  to the right of   19
50   21  to the right of   14