Do you see both sand and grass?
Yes, there are both sand and grass.
    src        edge_attr  dst
0     0  to the right of   15
1     1   to the left of    3
2     1   to the left of   19
3     2  to the right of   16
4     2  to the right of   18
5     3  to the right of    1
6     5               on    1
7    10               on    9
8    11          wearing   14
9    11               on    1
10   14  to the right of   15
11   15   to the left of    0
12   15   to the left of   14
13   16   to the left of    2
14   18   to the left of    2
15   19  to the right of    1