Is the clock on a clock tower?
No, the clock is on the apple.
   src        edge_attr  dst
0    3  to the right of    6
1    3  to the right of    9
2    3  to the right of    7
3    6   to the left of    3
4    7   to the left of    3
5    9         stuck in    1
6    9   to the left of    3
7    9               on    1