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