Is the policeman to the right of a horse?
No, the policeman is to the right of a shield.
     src        edge_attr  dst
0      0   to the left of   12
1      0  to the right of   19
2      0  to the right of    5
3      0  to the right of    7
4      0  to the right of   21
..   ...              ...  ...
106   24  to the right of   17
107   24   to the left of   22
108   25   to the left of   21
109   25  to the right of   17
110   25   to the left of   22

[111 rows x 3 columns]