Is the ring made of metal or plastic?
The ring is made of metal.
   src        edge_attr  dst
0    0   to the left of    4
1    0  to the right of    3
2    1               of    6
3    1   to the left of    7
4    3   to the left of    0
5    3   to the left of    4
6    4  to the right of    3
7    4  to the right of    0
8    7  to the right of    1
9    7               of    6