Are there any vans at the traffic light on the right?
Yes, there is a van at the traffic light.
    src        edge_attr  dst
0     0  to the right of    9
1     1  to the right of    6
2     1   to the left of    7
3     2  to the right of   12
4     2  to the right of    6
5     4            above    8
6     4               on    2
7     4  to the right of   17
8     5               on    0
9     5  to the right of   16
10    6   to the left of    7
11    6  to the right of   10
12    6  to the right of   19
13    6   to the left of    1
14    6   to the left of    2
15    7               at    4
16    7   to the left of   14
17    7  to the right of    6
18    7  to the right of    1
19    7  to the right of   12
20    7   to the left of    8
21    8             near   18
22    8            below    4
23    8  to the right of    7
24    8               at    4
25    9   to the left of   16
26    9   to the left of    0
27   10   to the left of    6
28   10   to the left of   19
29   12             near   18
30   12      in front of   18
31   12   to the left of    2
32   12   to the left of    7
33   12   to the left of   17
34   14  to the right of    7
35   15  to the right of   16
36   16  to the right of    9
37   16   to the left of   15
38   16   to the left of    5
39   17  to the right of   12
40   17   to the left of    4
41   18             near    8
42   18             near   12
43   18           behind   12
44   19  to the right of   10
45   19   to the left of    6