How are the vehicles behind the fence near the garbage called?
The vehicles are cars.
    src        edge_attr  dst
0     0           behind    6
1     0  to the right of    7
2     1      in front of    6
3     1             near    2
4     2             near    1
5     2  to the right of   13
6     2  to the right of    8
7     4  to the right of    7
8     4  to the right of   11
9     5  to the right of    6
10    6      in front of    0
11    6   to the left of    5
12    6           behind    1
13    7   to the left of    4
14    7   to the left of    0
15    7  to the right of   11
16    8  to the right of   13
17    8  to the right of    9
18    8   to the left of    2
19    9   to the left of    8
20    9  to the right of   13
21   10               in    3
22   11   to the left of    4
23   11   to the left of    7
24   12               on   10
25   12        on top of   10
26   13   to the left of    8
27   13   to the left of    2
28   13   to the left of    9