What is the color of the plate that is to the left of the car?
The plate is green.
    src        edge_attr  dst
0     0   to the left of    1
1     0  to the right of   12
2     0   to the left of    7
3     0  to the right of   18
4     0  to the right of   16
..  ...              ...  ...
72   20   to the left of   11
73   21               on   20
74   21   to the left of   22
75   22   to the left of    3
76   22  to the right of   21

[77 rows x 3 columns]