Is the policeman to the right of a helmet?
No, the policeman is to the right of a man.
    src        edge_attr  dst
0     0   to the left of   16
1     1  to the right of   17
2     1  to the right of    2
3     1  to the right of    6
4     2   to the left of    1
..  ...              ...  ...
64   18  to the right of    2
65   18   to the left of    3
66   18  to the right of   17
67   18   to the left of   12
68   18          wearing    1

[69 rows x 3 columns]