What is the bench made of?
The bench is made of concrete.
    src        edge_attr  dst
0     0   to the left of   21
1     1   to the left of   20
2     1   to the left of    2
3     2  to the right of    1
4     2  to the right of    8
5     2  to the right of    5
6     2          wearing    0
7     3   to the left of   13
8     4          wearing   18
9     4          wearing    1
10    4   to the left of   17
11    5   to the left of    9
12    5   to the left of    2
13    5   to the left of   11
14    5   to the left of   10
15    5   to the left of   20
16    6  to the right of   15
17    8   to the left of   11
18    8   to the left of   10
19    8   to the left of   20
20    8   to the left of    2
21    8   to the left of    9
22    9  to the right of    5
23    9  to the right of    8
24   10  to the right of    5
25   10  to the right of    8
26   11  to the right of    8
27   11  to the right of    5
28   12   to the left of   17
29   13   to the left of   17
30   13  to the right of    3
31   15   to the left of    6
32   16  to the right of   19
33   17  to the right of   13
34   17  to the right of   12
35   17  to the right of    4
36   17  to the right of   19
37   19   to the left of   17
38   19   to the left of   16
39   20  to the right of    8
40   20  to the right of    5
41   20  to the right of    1
42   21  to the right of    0