Is there either a round clock or window?
Yes, there is a round window.
   src        edge_attr  dst
0    2   to the left of   11
1    4   to the left of    7
2    6   to the left of    9
3    7   to the left of   10
4    7  to the right of    4
5    9  to the right of    6
6   10  to the right of    7
7   11  to the right of    2