Do you see any grass there that is not tall?
No, there is grass but it is tall.
     src        edge_attr  dst
0      0  to the right of    8
1      0  to the right of   11
2      0  to the right of   20
3      0  to the right of   12
4      0  to the right of    3
..   ...              ...  ...
127   21   to the left of    5
128   21   to the left of    3
129   21           behind   16
130   21   to the left of    9
131   21   to the left of    8

[132 rows x 3 columns]