What material is the floor?
The floor is made of wood.
   src        edge_attr  dst
0    2            under   10
1    2            below   10
2    3               of    9
3    5   to the left of    7
4    6               on    5
5    7  to the right of    5
6    8               on    4
7    9  to the right of   10
8   10   to the left of    9
9   10            above    2