What is the desk lamp on, a desk or a nightstand?
The desk lamp is on a desk.
    src        edge_attr  dst
0     0   to the left of   10
1     0               on    6
2     0  to the right of    2
3     0  to the right of   11
4     1  to the right of    3
5     1               on    6
6     2               on    6
7     2   to the left of   14
8     2   to the left of    0
9     3   to the left of    1
10    3               on    6
11    3  to the right of    5
12    4               on    6
13    5   to the left of    3
14    7               on    6
15    8               on    6
16    9   to the left of   13
17    9   to the left of   12
18   10               by    0
19   10               on    6
20   10  to the right of    0
21   11               of    2
22   11   to the left of   14
23   11   to the left of    0
24   12  to the right of    9
25   13  to the right of    9
26   14               by    0
27   14  to the right of   11
28   14  to the right of    2
29   14               on    6