What is on the toilet on the right?
The lemons are on the toilet.
   src        edge_attr  dst
0    1               on    3
1    1  to the right of    2
2    2   to the left of    1
3    2   to the left of    3
4    3  to the right of    2
5    3  to the right of    4
6    3  to the right of    5
7    4   to the left of    3
8    4               of    4
9    5   to the left of    3