Is he in front or behind the green wall?
The man is in front of the wall.
    src        edge_attr  dst
0     0      in front of   10
1     0  to the right of   15
2     0  to the right of   10
3     0  to the right of   16
4     1   to the left of   13
5     1   to the left of   14
6     2   to the left of   16
7     2   to the left of    8
8     3   to the left of    8
9     4   to the left of    9
10    4               on    5
11    5   to the left of    9
12    6   to the left of    9
13    6   to the left of   17
14    7   to the left of    8
15    8               on   11
16    8  to the right of    2
17    8  to the right of    3
18    8  to the right of    7
19    8  to the right of   13
20    9  to the right of    4
21    9  to the right of    5
22    9  to the right of   17
23    9  to the right of   12
24    9  to the right of   15
25    9  to the right of    6
26    9               on   11
27   10          wearing   13
28   10          wearing    2
29   10          holding    1
30   10      in front of   11
31   10           behind    0
32   10          wearing    6
33   10          wearing   15
34   10   to the left of    0
35   11           behind   10
36   12   to the left of    9
37   13   to the left of    8
38   13  to the right of    1
39   14  to the right of    1
40   15   to the left of    9
41   15   to the left of    0
42   16  to the right of    2
43   16   to the left of    0
44   17   to the left of    9
45   17  to the right of    6