Which material was used to make the white table?
The table is made of metal.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of   18
2     3   to the left of    4
3     3  to the right of    8
4     3   to the left of    5
5     3   to the left of    7
6     3   to the left of   18
7     4  to the right of   11
8     4  to the right of    0
9     4  to the right of   14
10    4  to the right of   15
11    4  to the right of   12
12    4  to the right of    3
13    4  to the right of   16
14    4  to the right of    8
15    5  to the right of    3
16    5   to the left of   10
17    7  to the right of    3
18    7   to the left of   10
19    8   to the left of   18
20    8   to the left of    3
21    8   to the left of    4
22   10               by    1
23   10  to the right of    5
24   10  to the right of    7
25   11   to the left of   18
26   11   to the left of    4
27   12   to the left of    4
28   14   to the left of   18
29   14   to the left of    4
30   15               on    9
31   15   to the left of    4
32   16   to the left of    4
33   18  to the right of    3
34   18  to the right of    8
35   18  to the right of   11
36   18  to the right of    0
37   18  to the right of   14