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