Are the window frame and the fence made of the same material?
No, the window frame is made of wood and the fence is made of metal.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    5
2     0  to the right of    6
3     1   to the left of    5
4     2   to the left of    5
5     2   to the left of    3
6     2   to the left of   10
7     3   to the left of    0
8     3  to the right of   10
9     3  to the right of    2
10    5               on    3
11    5  to the right of    2
12    5  to the right of    1
13    5   to the left of    0
14    6   to the left of    0
15    6  to the right of   10
16    9           behind    2
17   10   to the left of    6
18   10   to the left of    3
19   10  to the right of    2