Which place is it?
It is a field.
     src        edge_attr  dst
0      0   to the left of    8
1      0  to the right of    6
2      0   to the left of    7
3      0   to the left of    1
4      0  to the right of    5
..   ...              ...  ...
97    19   to the left of   16
98    20  to the right of   18
99    20  to the right of    2
100   20  to the right of    3
101   20   to the left of   17

[102 rows x 3 columns]