Is there any tall grass or snow?
No, there is grass but it is short.
    src        edge_attr  dst
0     0   to the left of    4
1     3  to the right of   10
2     3  to the right of   14
3     3  to the right of   16
4     3  to the right of    5
5     3  to the right of   17
6     3  to the right of   18
7     4  to the right of    0
8     4   to the left of   19
9     5   to the left of    3
10    5  to the right of    8
11    5  to the right of   16
12    5  to the right of   10
13    8   to the left of   17
14    8   to the left of   19
15    8   to the left of    5
16    8   to the left of   16
17    9  to the right of   15
18    9               on    6
19   10   to the left of   17
20   10   to the left of   19
21   10   to the left of    5
22   10   to the left of    3
23   11               on   14
24   11               on   16
25   11   to the left of   19
26   13   to the left of   19
27   14   to the left of    3
28   15   to the left of    9
29   16   to the left of   17
30   16   to the left of    5
31   16   to the left of   19
32   16   to the left of    3
33   16  to the right of    8
34   17               on   18
35   17   to the left of   19
36   17  to the right of   16
37   17   to the left of    3
38   17  to the right of   10
39   17  to the right of    8
40   17               on   12
41   18   to the left of    3
42   19  to the right of    8
43   19  to the right of    4
44   19  to the right of   13
45   19  to the right of   10
46   19  to the right of   11
47   19  to the right of   17
48   19  to the right of   16