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