What is the bench made of?
The bench is made of plastic.
    src        edge_attr  dst
0     0   to the left of   14
1     1  to the right of    3
2     1  to the right of    4
3     2  to the right of   10
4     2  to the right of    9
5     3   to the left of   16
6     3   to the left of   12
7     3   to the left of   10
8     3   to the left of    1
9     4   to the left of   12
10    4   to the left of   16
11    4   to the left of    1
12    9   to the left of    2
13    9   to the left of   14
14   10   to the left of    2
15   10  to the right of    3
16   10   to the left of   14
17   11           behind   16
18   12          wearing   14
19   12       sitting on   16
20   12  to the right of    4
21   12  to the right of    3
22   13      in front of   16
23   14  to the right of   10
24   14  to the right of    0
25   14  to the right of    9
26   16               on   13
27   16  to the right of    3
28   16  to the right of    4
29   16      in front of   11