What type of animal is this, a pig or a lamb?
This is a lamb.
   src        edge_attr  dst
0    4               in    9
1    5   to the left of    7
2    5   to the left of    6
3    6   to the left of    7
4    6  to the right of    5
5    7  to the right of    5
6    7  to the right of    6