Which kind of furniture is made of metal?
The furniture is a table.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    6
2     0  to the right of   17
3     2  to the right of   18
4     2  to the right of    9
5     2      in front of    7
6     4   to the left of   13
7     4   to the left of   16
8     5  to the right of    6
9     5   to the left of   16
10    5   to the left of    0
11    5   to the left of   11
12    5   to the left of   13
13    6   to the left of    0
14    6   to the left of    5
15    6   to the left of   12
16    6   to the left of   17
17    7           behind    2
18    7   to the left of   16
19    7  to the right of    9
20    7  to the right of   18
21    9   to the left of    7
22    9   to the left of    2
23   11  to the right of   17
24   11  to the right of    5
25   12   to the left of   15
26   12  to the right of    6
27   12   to the left of   16
28   12   to the left of   13
29   13  to the right of   15
30   13  to the right of   12
31   13  to the right of   19
32   13  to the right of    4
33   13  to the right of    5
34   15  to the right of   12
35   15   to the left of   16
36   15   to the left of   13
37   16  to the right of    5
38   16  to the right of    4
39   16  to the right of    7
40   16  to the right of   15
41   16  to the right of   18
42   16  to the right of   19
43   16  to the right of   12
44   17   to the left of    0
45   17   to the left of   11
46   17  to the right of    6
47   18   to the left of    2
48   18   to the left of   16
49   18   to the left of    7
50   19   to the left of   13
51   19   to the left of   16