What is the vehicle to the left of the person on the sidewalk?
The vehicle is a bus.
     src        edge_attr  dst
0      0   to the left of   21
1      0   to the left of   17
2      0  to the right of   25
3      0  to the right of   18
4      0  to the right of    7
..   ...              ...  ...
163   28   to the left of   21
164   28   to the left of    0
165   28  to the right of   25
166   29  to the right of    7
167   29  to the right of    3

[168 rows x 3 columns]