Is there either any sand or grass that is brown?
Yes, the grass is brown.
     src        edge_attr  dst
0      0  to the right of    6
1      0  to the right of    1
2      1       walking on   21
3      1   to the left of    5
4      1   to the left of    4
..   ...              ...  ...
96    22   to the left of   14
97    22       walking on    0
98    22           eating   14
99    23   to the left of   20
100   23   to the left of   19

[101 rows x 3 columns]