Is there either any grass or sand that is not brown?
No, there is grass but it is brown.
    src        edge_attr  dst
0     1   to the left of    7
1     1   to the left of    6
2     3  to the right of   11
3     3             near    8
4     3  to the right of    9
5     3  to the right of    7
6     5               of    9
7     6  to the right of    7
8     6  to the right of    1
9     6  to the right of    9
10    7   to the left of    6
11    7   to the left of    3
12    7  to the right of    1
13    8             near    3
14    9               in    8
15    9   to the left of    6
16    9   to the left of    3
17   11               of    9
18   11   to the left of    3