What is that clock on?
The clock is on the table.
    src        edge_attr  dst
0     1  to the right of    7
1     1  to the right of    8
2     2  to the right of    5
3     3  to the right of    5
4     4  to the right of    5
5     5   to the left of    3
6     5               on    3
7     5   to the left of    4
8     5   to the left of    2
9     6               of    5
10    7   to the left of    8
11    7   to the left of    1
12    8   to the left of    1
13    8  to the right of    7