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