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