What type of material is the floor made of?
The floor is made of wood.
    src        edge_attr  dst
0     0   to the left of   21
1     0   to the left of    4
2     1  to the right of   15
3     1   to the left of   12
4     1   to the left of    7
5     2  to the right of    9
6     2   to the left of   14
7     2  to the right of   11
8     2               on    5
9     3   to the left of   14
10    3  to the right of   11
11    3  to the right of    9
12    4  to the right of    0
13    4  to the right of   16
14    4               on    5
15    6  to the right of   17
16    7  to the right of    1
17    7  to the right of   21
18    8               in    2
19    8               in    6
20    9   to the left of    2
21    9   to the left of    3
22   10   to the left of   14
23   10   to the left of   20
24   11               on    5
25   11   to the left of    2
26   11   to the left of    3
27   11   to the left of   13
28   11   to the left of   18
29   12  to the right of   21
30   12  to the right of    1
31   13  to the right of   11
32   14  to the right of   10
33   14  to the right of    3
34   14  to the right of    2
35   14  to the right of   19
36   15               of    4
37   15  to the right of   16
38   15   to the left of    1
39   16   to the left of   21
40   16   to the left of    4
41   16   to the left of   15
42   16               on    0
43   17   to the left of    6
44   17               on    5
45   18  to the right of   11
46   19   to the left of   14
47   19   to the left of   20
48   20  to the right of   10
49   20  to the right of   21
50   20               of    4
51   20  to the right of   19
52   21               of    4
53   21   to the left of   12
54   21   to the left of   20
55   21  to the right of   16
56   21   to the left of    7
57   21  to the right of    0