Is the truck yellow or gray?
The truck is gray.
    src        edge_attr  dst
0     0  to the right of    2
1     1  to the right of    4
2     1   to the left of    5
3     2   to the left of    7
4     2   to the left of    0
5     4   to the left of    1
6     5  to the right of    6
7     5  to the right of    1
8     6   to the left of    5
9     7               on    0
10    7  to the right of    2