What is on the wall?
The urinal is on the wall.
   src        edge_attr  dst
0    1   to the left of    5
1    3  to the right of    4
2    3      attached to    5
3    4      attached to    1
4    4   to the left of    3
5    5               on    0
6    5   to the left of    6
7    5  to the right of    1
8    6  to the right of    5