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