What is surrounding the field?
The cages are surrounding the field.
    src         edge_attr  dst
0     1    to the left of    7
1     1    to the left of    6
2     1   to the right of    8
3     1   to the right of    4
4     1  standing next to    2
..  ...               ...  ...
70   14   to the right of    9
71   14   to the right of    5
72   14   to the right of    2
73   15   to the right of   11
74   15    to the left of    4

[75 rows x 3 columns]