What is the item of furniture that the lamp is on?
The piece of furniture is a desk.
    src        edge_attr  dst
0     0  to the right of   13
1     1               on   13
2     1  to the right of   12
3     1  to the right of    4
4     2  to the right of    6
5     2   to the left of    3
6     2   to the left of   11
7     2   to the left of   10
8     3  to the right of    2
9     3           beside   11
10    4   to the left of    1
11    4   to the left of   13
12    6   to the left of    2
13    6   to the left of   13
14    7  to the right of   12
15    7           beside    8
16    9               on    8
17    9   to the left of   11
18    9   to the left of   10
19   10  to the right of    2
20   10  to the right of    9
21   11  to the right of    9
22   11  to the right of    2
23   12               on    8
24   12   to the left of    7
25   12   to the left of    1
26   12   to the left of   13
27   13  to the right of    4
28   13  to the right of    6
29   13   to the left of   14
30   13   to the left of    0
31   13  to the right of   12
32   14          contain    0
33   14               on   11
34   14  to the right of   13
35   14               on    8
36   14           beside    1
37   14               of    0