What do both the plate and the fence have in common?
The color, both the plate and the fence are white.
    src        edge_attr  dst
0     1  to the right of    2
1     1  to the right of    5
2     1   to the left of    4
3     2             near   12
4     2          next to   12
5     2   to the left of    5
6     2   to the left of    1
7     2   to the left of   14
8     2   to the left of    8
9     3   to the left of   15
10    3        on top of    9
11    4  to the right of    1
12    5   to the left of    1
13    5  to the right of    2
14    6  to the right of   11
15    6        on top of    7
16    8        on top of   12
17    8  to the right of    2
18    8   to the left of   13
19    9             with   15
20    9        on top of   10
21    9        on top of   12
22   11        on top of   12
23   11         lying on   12
24   11   to the left of    6
25   12             near    2
26   13  to the right of    8
27   14           inside    1
28   14  to the right of    2
29   15        on top of    9
30   15  to the right of    3