What vehicle is not blue?
The vehicle is a van.
    src        edge_attr  dst
0     2   to the left of   12
1     2   to the left of   11
2     2   to the left of    9
3     2  to the right of    6
4     2   to the left of    8
5     2           behind    8
6     2   to the left of   13
7     4   to the left of   14
8     5   to the left of    9
9     5   to the left of   11
10    6   to the left of    2
11    6               on    0
12    7  to the right of   14
13    8  to the right of    2
14    8      in front of    2
15    9   to the left of   12
16    9               on    8
17    9  to the right of   10
18    9  to the right of    5
19    9  to the right of    2
20    9          wearing   11
21   10   to the left of   13
22   10   to the left of    9
23   11  to the right of    5
24   11  to the right of    2
25   12               of    8
26   12  to the right of    2
27   12  to the right of    9
28   13  to the right of    2
29   13  to the right of   10
30   14  to the right of    4
31   14   to the left of    7