Is the fence to the left or to the right of the cow that is on the left?
The fence is to the left of the cow.
    src        edge_attr  dst
0     0  to the right of    4
1     1  to the right of   22
2     1  to the right of   12
3     1  to the right of   23
4     2  to the right of    8
..  ...              ...  ...
71   22   to the left of    1
72   23  to the right of   12
73   23  to the right of    4
74   23   to the left of    1
75   23   to the left of   22

[76 rows x 3 columns]