Are there any helmets to the right of the truck?
No, there is a camel to the right of the truck.
    src        edge_attr  dst
0     0   to the left of    4
1     0  to the right of   17
2     0   to the left of    7
3     0   to the left of    8
4     0   to the left of   16
..  ...              ...  ...
63   17   to the left of   16
64   17   to the left of   10
65   17   to the left of    4
66   17   to the left of    5
67   17   to the left of    8

[68 rows x 3 columns]