Which animal is this, a kitten or a dog?
That is a dog.
   src        edge_attr  dst
0    1  to the right of    4
1    1  to the right of    2
2    2               in    0
3    2   to the left of    1
4    2   to the left of    3
5    2   to the left of    4
6    3  to the right of    2
7    4  to the right of    2
8    4   to the left of    1