Which kind of vehicle is white?
The vehicle is a truck.
   src        edge_attr  dst
0    0   to the left of    6
1    0   to the left of    1
2    1  to the right of    3
3    1  to the right of    5
4    1  to the right of    0
5    3   to the left of    1
6    3   to the left of    5
7    5   to the left of    1
8    5  to the right of    3
9    6  to the right of    0