What is the bathtub in?
The bathtub is in the shower.
   src        edge_attr  dst
0    0  to the right of    8
1    0  to the right of    4
2    1  to the right of    6
3    4   to the left of    0
4    4               in    7
5    6   to the left of    1
6    8   to the left of    0