Is there any white stop sign or fire hydrant?
No, there is a stop sign but it is red.
    src       edge_attr  dst
0     0  to the left of   15
1     0  to the left of   12
2     0  to the left of    3
3     0  to the left of   17
4     0          behind    3
..  ...             ...  ...
57   18  to the left of   17
58   18  to the left of    9
59   20  to the left of    3
60   21  to the left of    9
61   21  to the left of   13

[62 rows x 3 columns]