Are there trucks or buses that are blue?
Yes, the truck is blue.
    src        edge_attr  dst
0     0   to the left of   12
1     0  to the right of    3
2     0   to the left of    2
3     1  to the right of   15
4     1   to the left of    9
5     2  to the right of    0
6     3   to the left of    0
7     4   to the left of   15
8     4   to the left of   14
9     4   to the left of   10
10    5   to the left of   15
11    7  to the right of   15
12    7  to the right of   14
13    8   to the left of   14
14    9  to the right of    1
15   10  to the right of    4
16   12             near   13
17   12  to the right of    0
18   13             near   12
19   14   to the left of    7
20   14  to the right of    8
21   14  to the right of    4
22   15  to the right of    5
23   15  to the right of    4
24   15   to the left of    7
25   15   to the left of    1