What do both the wall and the fence have in common?
The color, both the wall and the fence are white.
    src        edge_attr  dst
0     1   to the left of   15
1     2  to the right of    4
2     2               of    9
3     2  to the right of   18
4     4  to the right of    6
5     4   to the left of    2
6     4   to the left of   10
7     4   to the left of    9
8     4  to the right of   14
9     4  to the right of   13
10    5   to the left of   15
11    6   to the left of    4
12    6   to the left of   18
13    6   to the left of   13
14    8   to the left of   11
15    8   to the left of   15
16    9  to the right of   18
17    9  to the right of    4
18   10  to the right of    4
19   10  to the right of   18
20   11  to the right of    8
21   13  to the right of    6
22   13   to the left of    4
23   14   to the left of    4
24   14   to the left of   18
25   15   to the left of   17
26   15  to the right of    5
27   15  to the right of    1
28   15  to the right of    8
29   17  to the right of   18
30   17  to the right of   15
31   18          wearing    4
32   18   to the left of    2
33   18   to the left of   10
34   18   to the left of   19
35   18   to the left of   17
36   18   to the left of    9
37   18  to the right of    6
38   18  to the right of   14
39   19  to the right of   18