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