Is there any brown grass or sand?
Yes, there is brown grass.
     src        edge_attr  dst
0      2   to the left of   18
1      2   to the left of    9
2      2   to the left of   28
3      2   to the left of   20
4      3  to the right of   15
..   ...              ...  ...
171   37   to the left of   30
172   37  to the right of   36
173   37   to the left of   23
174   37  to the right of   25
175   37  to the right of   12

[176 rows x 3 columns]