Where is the grass?
The grass is in the pen.
    src        edge_attr  dst
0     2           behind   11
1     2      in front of   10
2     2             near   11
3     2           behind    9
4     2             near    9
5     3      in front of   10
6     5  to the right of   10
7     6  to the right of   10
8     7               in    3
9     9               in    8
10    9          next to    2
11    9           behind   10
12    9          kept in    8
13    9          next to   10
14    9      in front of    2
15   10           behind    3
16   10   to the left of    6
17   10      in front of    9
18   10           behind    2
19   10             near    9
20   10   to the left of    5
21   11     looking over    2
22   11          next to    2
23   11      in front of    2
24   11          kept in    8
25   11               in    8