Is there a cat in the cage?
Yes, there is a cat in the cage.
   src        edge_attr  dst
0    0   to the left of    7
1    1  to the right of    7
2    1               of    3
3    3               in    9
4    5  to the right of    6
5    6   to the left of    5
6    7   to the left of    1
7    7  to the right of    0