Is the fence by the sidewalk made of metal?
No, the fence is made of wood.
    src        edge_attr  dst
0     0  to the right of   18
1     1           behind   14
2     1   to the left of   11
3     1   to the left of   10
4     2           behind   14
5     2  to the right of    7
6     2  to the right of    3
7     2  to the right of   14
8     2   to the left of   13
9     2  to the right of   17
10    3   to the left of   13
11    3  to the right of    7
12    3  to the right of   17
13    3  to the right of   14
14    3  to the right of   18
15    3   to the left of    2
16    4  to the right of    5
17    5   to the left of   13
18    5   to the left of    4
19    7  to the right of   18
20    7   to the left of   17
21    7   to the left of    3
22    7   to the left of    2
23    9  to the right of   13
24   10  to the right of    1
25   11  to the right of    1
26   11               by   10
27   13  to the right of    5
28   13  to the right of    2
29   13  to the right of    3
30   13   to the left of    9
31   14               on   15
32   14      in front of   18
33   14      in front of    1
34   14      in front of    2
35   14   to the left of    2
36   14  to the right of   18
37   14   to the left of    3
38   14               on   16
39   14        riding on   15
40   14       skating on   16
41   14          wearing    6
42   14          wearing   17
43   17  to the right of    7
44   17   to the left of    3
45   17   to the left of    2
46   17  to the right of   18
47   18   to the left of    0
48   18   to the left of   14
49   18   to the left of   17
50   18   to the left of    3
51   18           behind   14
52   18   to the left of    7
53   18   on the side of   16