What color is the car on the road?
The car is silver.
   src        edge_attr  dst
0    0  to the right of    5
1    1  to the right of    5
2    1   to the left of    4
3    4               on    2
4    4  to the right of    1
5    4  to the right of    5
6    5   to the left of    0
7    5   to the left of    4
8    5   to the left of    1