What is the color of the tall grass?
The grass is brown.
    src        edge_attr  dst
0     3           flying    2
1     4   to the left of   17
2     4  to the right of   11
3     7  to the right of   12
4     8   to the left of   15
5     8  to the right of   11
6     9  to the right of   11
7    10   to the left of   17
8    10  to the right of   11
9    11   to the left of   14
10   11   to the left of    4
11   11   to the left of    8
12   11   to the left of   17
13   11   to the left of   15
14   11   to the left of    9
15   11   to the left of   10
16   11   to the left of   18
17   12   to the left of    7
18   14  to the right of   11
19   15  to the right of    8
20   15  to the right of   11
21   17  to the right of   11
22   17  to the right of   10
23   17  to the right of    4
24   18  to the right of   11