Is there either any sand or grass that is not brown?
No, there is grass but it is brown.
    src        edge_attr  dst
0     0   to the left of    5
1     0           eating    3
2     0   to the left of    2
3     1           eating    3
4     1   to the left of    4
5     2   to the left of    5
6     2           eating    3
7     2  to the right of    0
8     4  to the right of    1
9     4           eating    3
10    5  to the right of    2
11    5  to the right of    0