Which animal is that, a wolf or a bear?
This is a bear.
   src        edge_attr  dst
0    0  to the right of    1
1    0               of    6
2    1   to the left of    0
3    1               of    6
4    2  to the right of    7
5    3  to the right of    5
6    5   to the left of    3
7    7   to the left of    2