How tall is the grass?
The grass is short.
    src        edge_attr  dst
0     1   to the left of   11
1     1          wearing    2
2     1          wearing   22
3     1          wearing   20
4     3  to the right of   11
5     3  to the right of   13
6     3  to the right of   12
7     4  to the right of   18
8     4   to the left of   11
9     6   to the left of   19
10    6         lying on    5
11    7  to the right of   11
12    7   to the left of   19
13    8   to the left of   19
14   10       sitting in   16
15   11   to the left of    3
16   11  to the right of    1
17   11   to the left of   12
18   11   to the left of   13
19   11  to the right of    4
20   11   to the left of    7
21   11  to the right of   15
22   11   to the left of   19
23   11  to the right of   20
24   12   to the left of   19
25   12  to the right of   11
26   12   to the left of    3
27   13  to the right of   11
28   13   to the left of    3
29   13   to the left of   19
30   15  to the right of   18
31   15   to the left of   11
32   18   to the left of    4
33   18   to the left of   15
34   19  to the right of   13
35   19  to the right of   12
36   19  to the right of   11
37   19  to the right of    8
38   19  to the right of    7
39   19  to the right of    6
40   19  to the right of   21
41   19          wearing   23
42   20   to the left of   11
43   21   to the left of   19