Which kind of vehicle is driving on the street?
The vehicles are buses.
    src        edge_attr  dst
0     0  to the right of    5
1     2   to the left of   16
2     2   to the left of    7
3     2  to the right of   15
4     3   to the left of   16
5     3  to the right of   15
6     5       driving on    1
7     5  to the right of   11
8     5   to the left of   12
9     5   to the left of   13
10    5   to the left of   16
11    5  to the right of   15
12    5   to the left of    8
13    5   to the left of    6
14    5   to the left of    0
15    6  to the right of    9
16    6  to the right of    5
17    6   to the left of    7
18    7  to the right of    6
19    7  to the right of    2
20    7            below   14
21    7  to the right of    9
22    8  to the right of    5
23    9   to the left of   16
24    9  to the right of   15
25    9   to the left of    6
26    9   to the left of    7
27    9            below   14
28   10            below   14
29   11      in front of   16
30   11  to the right of   15
31   11   to the left of    5
32   12  to the right of    5
33   12               in    0
34   13  to the right of    5
35   15   to the left of    9
36   15   to the left of    5
37   15   to the left of   11
38   15   to the left of    3
39   15   to the left of    2
40   16           behind   11
41   16  to the right of    2
42   16  to the right of    3
43   16  to the right of    5
44   16  to the right of    9