What kind of vehicle is on the grass?
The vehicles are cars.
    src        edge_attr  dst
0     0  to the right of   13
1     2   to the left of   12
2     2           behind    9
3     2           behind    3
4     2   to the left of    9
5     3      in front of    2
6     7  to the right of   13
7     9  to the right of   15
8     9  to the right of   12
9     9  to the right of    2
10    9      in front of    2
11   10  to the right of   13
12   11  to the right of   13
13   12   to the left of    9
14   12  to the right of    2
15   13   to the left of   10
16   13               on    4
17   13               in   14
18   13   to the left of   11
19   13   to the left of    7
20   13   to the left of    0
21   15   to the left of    9
22   16          wearing    5
23   16               on    6