Is there either grass or sand that is brown?
Yes, the grass is brown.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    4
2     1               by    8
3     2             near    4
4     2  to the right of    0
5     2  to the right of   13
6     2   to the left of   15
7     3  to the right of    6
8     3  to the right of    4
9     4   to the left of    0
10    4   to the left of    3
11    4             near    2
12    4   to the left of   10
13    4  to the right of    6
14    5  to the right of    9
15    6   to the left of    3
16    6               in   13
17    6      in front of   10
18    6   to the left of    4
19    6   to the left of   13
20    7  to the right of    8
21    7  to the right of   11
22    8  to the right of   12
23    8   to the left of    7
24    8               by    1
25    8               on    1
26    8  to the right of   11
27    9   to the left of    5
28   10  to the right of    4
29   10           behind    6
30   10               in   13
31   10  to the right of   13
32   11               by    1
33   11   to the left of    7
34   11   to the left of    8
35   11   to the left of   14
36   12               of   11
37   12   to the left of    8
38   13   to the left of    2
39   13   to the left of   10
40   13  to the right of    6
41   13      in front of    3
42   14  to the right of   11
43   15  to the right of    2
44   15               in   13
45   15               by    1