What is the clock on?
The clock is on the wall.
    src        edge_attr  dst
0     1   to the left of    7
1     1  to the right of   14
2     2  to the right of   14
3     2   to the left of    7
4     3   to the left of    4
5     3   to the left of   16
6     3   to the left of   15
7     4               on    3
8     4  to the right of    3
9     6   to the left of   12
10    7  to the right of    2
11    7  to the right of    1
12    7  to the right of   17
13    8       hanging on    3
14   10  to the right of   20
15   12  to the right of    6
16   13            above   14
17   13   to the left of   20
18   14   to the left of    2
19   14            under   13
20   14   to the left of   17
21   14   to the left of    1
22   15  to the right of    3
23   15               on    4
24   16  to the right of    3
25   17   to the left of    7
26   17  to the right of   14
27   18               on   20
28   19               on   20
29   19   to the left of   20
30   20  to the right of   13
31   20  to the right of   19
32   20   to the left of   10
33   21               in    5
34   21               in    6