The urinal is mounted on what?
The urinal is mounted on the floor.
   src        edge_attr  dst
0    0       mounted on    2
1    0  to the right of    5
2    0   to the left of    8
3    0   to the left of    7
4    1               on    3
5    5   to the left of    0
6    7   to the left of    8
7    7  to the right of    0
8    8  to the right of    0
9    8  to the right of    7