What are the papers to the right of the lamp hanging on?
The papers are hanging on the wall.
    src        edge_attr  dst
0     0   to the left of   21
1     0   to the left of   11
2     1   to the left of   21
3     2   to the left of   11
4     3   to the left of   20
5     3  to the right of    7
6     3   to the left of    9
7     4   to the left of   19
8     5   to the left of   20
9     5   to the left of    8
10    6  to the right of    7
11    6   to the left of    9
12    6   to the left of   15
13    7   to the left of    3
14    7   to the left of    8
15    7   to the left of    6
16    7   to the left of   20
17    8  to the right of    7
18    8  to the right of    5
19    8   to the left of    9
20    8   to the left of   20
21    9  to the right of    3
22    9  to the right of    8
23    9  to the right of    6
24    9       hanging on    7
25   10  to the right of   13
26   10  to the right of   16
27   11               on   12
28   11  to the right of    0
29   11  to the right of    2
30   13   to the left of   10
31   13   to the left of   16
32   15       hanging on    6
33   15  to the right of    6
34   16   to the left of   10
35   16  to the right of   13
36   18   to the left of   20
37   19  to the right of    4
38   20  to the right of    8
39   20  to the right of    5
40   20  to the right of    7
41   20  to the right of   18
42   20  to the right of    3
43   21  to the right of    1
44   21  to the right of    0