What vehicle is to the left of the vehicle that looks gray?
The vehicle is a car.
    src        edge_attr  dst
0     2   to the left of   11
1     3   to the left of   11
2     5   to the left of   11
3     6   to the left of   11
4     7   to the left of   11
5     7               on    9
6     8   to the left of   11
7    10  to the right of   16
8    11  to the right of    5
9    11  to the right of    7
10   11  to the right of    8
11   11  to the right of    2
12   11  to the right of   13
13   11  to the right of   17
14   11  to the right of    3
15   11  to the right of    6
16   12               on    4
17   13               in    5
18   13   to the left of   11
19   16   to the left of   10
20   17   to the left of   11
21   17               in   14