What vehicle is the grass around of?
The grass is around the truck.
    src        edge_attr  dst
0     2               on   12
1     2           around   14
2     3             near   14
3     4               of   14
4     4  to the right of   13
5     5  to the right of   13
6     6      in front of   14
7     6  to the right of   13
8     7   to the left of   11
9     7   to the left of   15
10    7   to the left of   14
11    8               of    9
12    8            above   14
13    8  to the right of    9
14    9   to the left of    8
15   10               of   14
16   10  to the right of   14
17   10  to the right of   15
18   10  to the right of   11
19   11               of   14
20   11  to the right of    7
21   11   to the left of   10
22   11   to the left of   15
23   13   to the left of    5
24   13   to the left of    6
25   13   to the left of    4
26   13   to the left of   14
27   14  to the right of    7
28   14           behind    6
29   14            below    8
30   14             near    3
31   14   to the left of   10
32   14  to the right of   13
33   15   to the left of   10
34   15  to the right of    7
35   15               of   14
36   15  to the right of   11