Is the white toilet to the right of a dispenser?
Yes, the toilet is to the right of a dispenser.
   src        edge_attr  dst
0    0  to the right of    2
1    2               on    0
2    2   to the left of    0
3    2   to the left of    3
4    3  to the right of    4
5    3  to the right of    2
6    4   to the left of    3