Do you see any vans to the left of the red car?
No, there is a fence to the left of the car.
     src        edge_attr  dst
0      0   to the left of   13
1      0   to the left of    6
2      0   to the left of   15
3      0  to the right of   10
4      0   to the left of    3
..   ...              ...  ...
123   21   to the left of    8
124   21  to the right of    0
125   21  to the right of    3
126   21   to the left of   15
127   22   to the left of   15

[128 rows x 3 columns]