What was used to make the cart, wood or metal?
The cart is made of metal.
    src        edge_attr  dst
0     1  to the right of    2
1     2   to the left of    1
2     2               on    0
3     2      in front of   11
4     3  to the right of   11
5     3  to the right of    9
6     3  to the right of    7
7     4   to the left of   12
8     4   to the left of    6
9     4   to the left of    5
10    4   to the left of   10
11    5  to the right of    4
12    5        pushed by   11
13    6  to the right of   14
14    6  to the right of   11
15    6  to the right of   10
16    6  to the right of   15
17    6  to the right of    4
18    7   to the left of    3
19    7   to the left of    8
20    8  to the right of    7
21    8  to the right of    9
22    9   to the left of    8
23    9   to the left of    3
24   10  to the right of    4
25   10  to the right of   15
26   10   to the left of    6
27   11          wearing    4
28   11   to the left of    3
29   11   to the left of   12
30   11   to the left of    6
31   11           behind    2
32   11          pushing    5
33   11               on    6
34   11               on   12
35   12  to the right of   11
36   12  to the right of    4
37   12  to the right of   15
38   12  to the right of   14
39   14   to the left of    6
40   14   to the left of   12
41   15   to the left of   10
42   15   to the left of    6
43   15   to the left of   12