Do you see either any ball or fence in the photograph?
Yes, there is a fence.
     src        edge_attr  dst
0      0  to the right of    3
1      0  to the right of    5
2      1  to the right of   10
3      1   to the left of    9
4      1  to the right of   17
..   ...              ...  ...
122   20  to the right of   19
123   20   to the left of    7
124   20   to the left of   17
125   20  to the right of   12
126   20   to the left of   14

[127 rows x 3 columns]