Who is on the bike?
The policeman is on the bike.
     src        edge_attr  dst
0      0  to the right of   26
1      1  to the right of   13
2      1   to the left of   15
3      1   to the left of   18
4      1  to the right of   26
..   ...              ...  ...
145   28   to the left of   23
146   28   to the left of   22
147   28   to the left of   21
148   28   to the left of   11
149   29  to the right of   27

[150 rows x 3 columns]