What type of vehicle is on the wet pavement?
The vehicle is a bus.
    src        edge_attr  dst
0     1   to the left of   10
1     1  to the right of    8
2     2   to the left of    5
3     2   to the left of    6
4     4  to the right of    7
5     4               on    3
6     4  to the right of   13
7     5               on    3
8     5  to the right of    2
9     5  to the right of    9
10    6  to the right of    2
11    6  to the right of    9
12    7   to the left of    4
13    8   to the left of    1
14    8   to the left of   14
15    8   to the left of   10
16    9   to the left of    6
17    9   to the left of    5
18    9               on    3
19   10  to the right of   14
20   10   to the left of   11
21   10  to the right of    8
22   10  to the right of    1
23   11  to the right of   14
24   11  to the right of   10
25   13   to the left of    4
26   14   to the left of   10
27   14   to the left of   11
28   14  to the right of    8