Are there both sand and grass in this picture?
No, there is grass but no sand.
     src        edge_attr  dst
0      0  to the right of   21
1      0  to the right of   19
2      0  to the right of   24
3      0   to the left of   23
4      0  to the right of   17
..   ...              ...  ...
251   41   to the left of    0
252   41   to the left of   38
253   41   to the left of   33
254   41   to the left of   23
255   41   to the left of   36

[256 rows x 3 columns]