Are the fence and the building made of the same material?
Yes, both the fence and the building are made of wood.
    src        edge_attr  dst
0     0           behind    7
1     1  to the right of    6
2     1  to the right of    3
3     2   to the left of    4
4     2  to the right of    5
5     2  to the right of    3
6     2             near    4
7     3             near    7
8     3             near    6
9     3   to the left of    5
10    3   to the left of    2
11    3   to the left of    1
12    3  to the right of    6
13    3   to the left of    7
14    3  to the right of    8
15    4  to the right of    2
16    4             near    2
17    5  to the right of    3
18    5   to the left of    2
19    5  to the right of    8
20    6   to the left of    1
21    6   to the left of    7
22    6   to the left of    3
23    6             near    3
24    7  to the right of    8
25    7             near    3
26    7  to the right of    3
27    7  to the right of    6
28    8   to the left of    3
29    8   to the left of    5
30    8   to the left of    7