What is the animal in the zoo?
The animal is a polar bear.
   src        edge_attr  dst
0    0   to the left of    5
1    2               in    6
2    2   to the left of    5
3    3   to the left of    5
4    3               of    2
5    5  to the right of    3
6    5  to the right of    2
7    5  to the right of    0