What is the vehicle that the person is driving?
The vehicle is a bus.
    src        edge_attr  dst
0     0   to the left of    9
1     1   to the left of    2
2     2   to the left of    3
3     2  to the right of    1
4     3  to the right of    2
5     5   to the left of   18
6     8        on top of   12
7     8  to the right of   12
8     9             near   14
9     9  to the right of   10
10    9  to the right of    0
11    9  to the right of   13
12    9          next to   14
13   10   to the left of    9
14   11   on the side of   15
15   12   to the left of    8
16   13   to the left of    9
17   14             near    9
18   15  to the right of   19
19   15       driving on    4
20   17          driving   15
21   18  to the right of    5
22   19   to the left of   15