What vehicle is red?
The vehicle is a fire truck.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of    1
2     1               of    5
3     1  to the right of    0
4     2               on    4
5     2   to the left of    6
6     2             near    6
7     3             near    6
8     4             near    6
9     5  to the right of    0
10    5             near    6
11    6          next to    5
12    6             near    3
13    6             near    2
14    6             near    4
15    6               on    4
16    6  to the right of    2