What is the lamp on?
The lamp is on the desk.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of    5
2     0   to the left of    2
3     1   to the left of    5
4     1   to the left of   11
5     1   to the left of    2
6     1  to the right of   16
7     2  to the right of   10
8     2  to the right of    0
9     2  to the right of    1
10    2             with   11
11    2  to the right of   13
12    3   to the left of    4
13    3   to the left of   12
14    4  to the right of    8
15    4  to the right of    7
16    4  to the right of    3
17    4  to the right of   14
18    5  to the right of   10
19    5  to the right of    0
20    5  to the right of   13
21    5  to the right of    1
22    6  to the right of    9
23    7   to the left of   12
24    7   to the left of    4
25    7   to the left of   15
26    8   to the left of    4
27    8   to the left of   12
28    8               on    7
29    9   to the left of    6
30   10   to the left of    5
31   10   to the left of    2
32   10  to the right of   16
33   10   to the left of   11
34   11  to the right of    1
35   11               on    5
36   11  to the right of   13
37   11  to the right of   10
38   11  to the right of    0
39   12  to the right of   14
40   12  to the right of    3
41   12  to the right of    7
42   12  to the right of    8
43   13   to the left of    2
44   13   to the left of   11
45   13   to the left of    5
46   14   to the left of   12
47   14   to the left of    4
48   15  to the right of    7
49   16   to the left of   10
50   16               on    3
51   16   to the left of    1