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