Who is wearing the hat?
The policeman is wearing a hat.
     src        edge_attr  dst
0      0   to the left of    8
1      0   to the left of    9
2      0   to the left of   17
3      0  to the right of   11
4      0  to the right of    4
..   ...              ...  ...
111   17  to the right of    9
112   17   to the left of    6
113   17  to the right of   13
114   17  to the right of   12
115   17  to the right of   16

[116 rows x 3 columns]