What vehicle is in front of the street lights?
The vehicle is a bus.
    src        edge_attr  dst
0     0  to the right of   16
1     0      in front of   18
2     1  to the right of    5
3     1  to the right of    4
4     1  to the right of   15
..  ...              ...  ...
66   19   to the left of    8
67   19  to the right of   13
68   19  to the right of   16
69   20   to the left of   10
70   20  to the right of   18

[71 rows x 3 columns]