What color is the truck on the right?
The truck is blue.
    src        edge_attr  dst
0     0   to the left of   10
1     1  to the right of   11
2     1  to the right of    5
3     1  to the right of    9
4     1  to the right of   13
5     4  to the right of   16
6     4   to the left of   13
7     5   to the left of    1
8     5   to the left of    9
9     6   to the left of    9
10    9  to the right of    5
11    9  to the right of    6
12    9   to the left of    1
13    9  to the right of   13
14    9  to the right of   15
15   10  to the right of   14
16   10  to the right of    0
17   10  to the right of   15
18   11   to the left of    1
19   11  to the right of   13
20   13  to the right of    4
21   13   to the left of    1
22   13  to the right of   16
23   13   to the left of    9
24   13   to the left of   11
25   14   to the left of   10
26   15   to the left of    9
27   15   to the left of   10
28   16   to the left of   13
29   16   to the left of    4