What vehicle is not red?
The vehicle is a trailer.
    src        edge_attr  dst
0     0             near    2
1     2             near    0
2     2          next to    0
3     2  to the right of    4
4     2  to the right of   13
5     2  to the right of   10
6     2  to the right of   15
7     2   on the side of    7
8     4   to the left of    2
9     4  to the right of    9
10    4   to the left of   11
11    6           behind    0
12    6             near    7
13    6          next to    7
14    7             near    6
15    9   to the left of    4
16    9               on   10
17   10   to the left of    2
18   10   to the left of   11
19   11  to the right of   10
20   11  to the right of    4
21   13               on   14
22   13   to the left of    2
23   15   to the left of    2