Are there any vans to the left of the bus the fence is to the right of?
No, there is a person to the left of the bus.
     src        edge_attr  dst
0      0   to the left of    5
1      0   to the left of   16
2      0   to the left of   17
3      0   to the left of   14
4      0   to the left of   18
..   ...              ...  ...
117   19  to the right of   14
118   19  to the right of   13
119   19  to the right of   20
120   20   to the left of   19
121   20   to the left of    8

[122 rows x 3 columns]