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