What is in front of the wall?
The planter is in front of the wall.
    src        edge_attr  dst
0     0   to the left of   18
1     0   to the left of   11
2     0   to the left of   10
3     1   to the left of   16
4     1   to the left of    4
5     1   to the left of   15
6     1   to the left of    6
7     3  to the right of   17
8     3           behind    5
9     4  to the right of    6
10    4  to the right of    1
11    5   to the left of   19
12    5  to the right of    8
13    5      in front of    3
14    6  to the right of    1
15    6   to the left of   14
16    6   to the left of    4
17    7   to the left of    8
18    8   to the left of    5
19    8               on    9
20    8  to the right of    7
21   10  to the right of    0
22   10  to the right of   11
23   10   to the left of   18
24   10  to the right of   14
25   11  to the right of   14
26   11  to the right of    0
27   11   to the left of   10
28   11   to the left of   18
29   14   to the left of   18
30   14  to the right of    6
31   14   to the left of   11
32   14   to the left of   10
33   15  to the right of    1
34   16  to the right of    1
35   17   to the left of    3
36   18  to the right of    0
37   18  to the right of   11
38   18  to the right of   10
39   18  to the right of   14
40   19               on    9
41   19  to the right of    5