How tall is the grass the sheep is in?
The grass is tall.
    src        edge_attr  dst
0     1  to the right of    9
1     2               in   12
2     2  to the right of    4
3     2   to the left of    3
4     3  to the right of    4
5     3  to the right of    2
6     3   to the left of    5
7     3               in   12
8     4               in   12
9     4   to the left of    3
10    4   to the left of    2
11    5  to the right of    3
12    6  to the right of   15
13    6         entering    5
14    8  to the right of   23
15    8  to the right of   20
16    9   to the left of   10
17    9   to the left of    1
18   10  to the right of    9
19   10       sitting in   15
20   11               in   13
21   14  to the right of   15
22   15   to the left of    6
23   15   to the left of   14
24   16  to the right of   19
25   17   to the left of   18
26   18  to the right of   17
27   19   to the left of   16
28   19  to the right of   23
29   19  to the right of   20
30   20   to the left of   19
31   20   to the left of    8
32   20   to the left of   23
33   23  to the right of   20
34   23   to the left of   19
35   23   to the left of    8