Are there boxes on the grass?
Yes, there is a box on the grass.
     src        edge_attr  dst
0      0               on   11
1      1  to the right of   11
2      3  to the right of   13
3      3           behind   16
4      3  to the right of    9
..   ...              ...  ...
103   17   to the left of   11
104   18  to the right of   11
105   20  to the right of   12
106   20  to the right of   11
107   20   to the left of    5

[108 rows x 3 columns]