What color does the vehicle to the left of the train have?
The car has blue color.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of    1
2     0  to the right of    9
3     0   to the left of    4
4     1   to the left of    0
5     1   to the left of   10
6     2   to the left of    0
7     3   to the left of    4
8     3  to the right of   10
9     4  to the right of    3
10    4  to the right of    0
11    4  to the right of   10
12    5               on    0
13    6  to the right of    8
14    7  to the right of    8
15    8   to the left of    7
16    8   to the left of    6
17    9   to the left of    0
18   10   to the left of    4
19   10  to the right of    1
20   10   to the left of    3