What is the vehicle to the left of the person?
The vehicle is a truck.
    src        edge_attr  dst
0     0          next to   10
1     0  to the right of   10
2     0               on    8
3     1      followed by    3
4     1             near    9
5     1  to the right of    9
6     1   to the left of    8
7     2           riding    1
8     2             near    9
9     2   to the left of   11
10    2  to the right of    9
11    2  to the right of   12
12    2               on    1
13    2          wearing    7
14    3     walking down   10
15    3          chasing    1
16    3        following    1
17    3   to the left of    8
18    4               by   10
19    4             near   10
20    4          next to   10
21    4   to the left of   12
22    5               on   10
23    5   to the left of    9
24    5   to the left of   12
25    5     driving down   10
26    6               on   10
27    7  to the right of    9
28    8  to the right of    1
29    8  to the right of    3
30    8  to the right of   10
31    9               on   10
32    9  to the right of    5
33    9     driving down   10
34    9   to the left of    7
35    9          next to    1
36    9          next to    2
37    9   to the left of    1
38    9   to the left of    2
39   10             near    0
40   10   to the left of    8
41   10             near    4
42   10   to the left of    0
43   11  to the right of    2
44   11        parked by   10
45   11  to the right of   12
46   12  to the right of    4
47   12   to the left of   11
48   12   to the left of    2
49   12  to the right of    5
50   12     driving down   10