Is there either brown grass or mud?
No, there is grass but it is green.
    src        edge_attr  dst
0     0  to the right of   14
1     0               of   10
2     1               on    6
3     1  to the right of   14
4     2  to the right of   15
5     2  to the right of   10
6     3               on   10
7     3   to the left of   15
8     5               by    6
9     9  to the right of   13
10   10   to the left of    2
11   12               on   13
12   13   to the left of    9
13   14   to the left of    0
14   14               of   10
15   14   to the left of    1
16   15               on   10
17   15  to the right of    3
18   15   to the left of    2