Do you see either any cars or fences that are gray?
Yes, the fence is gray.
    src        edge_attr  dst
0     0  to the right of    9
1     0  to the right of    7
2     0  to the right of    8
3     0  to the right of    2
4     1  to the right of    8
5     1  to the right of    2
6     1  to the right of    9
7     1               by   14
8     1  to the right of    3
9     1  to the right of    7
10    2   to the left of    0
11    2   to the left of    1
12    3               of    5
13    3   to the left of    1
14    3  to the right of    6
15    4   to the left of   14
16    4   to the left of    5
17    4   to the left of   13
18    5  to the right of    6
19    5  to the right of    4
20    5  to the right of   10
21    6             near    7
22    6   to the left of    3
23    6   to the left of    5
24    6   to the left of   14
25    7   to the left of    1
26    7   to the left of    0
27    7          next to    6
28    7             near    6
29    8   to the left of    0
30    8   to the left of    1
31    9   to the left of    0
32    9   to the left of    1
33   10   to the left of   14
34   10   to the left of    5
35   10   to the left of   13
36   11  to the right of   13
37   12  to the right of   13
38   13  to the right of    4
39   13  to the right of   10
40   13   to the left of   11
41   13   to the left of   12
42   14  to the right of    6
43   14  to the right of    4
44   14  to the right of   10