What is the gate made of?
The gate is made of wood.
    src        edge_attr  dst
0     0  to the right of    6
1     0   to the left of    3
2     2   to the left of    3
3     3  to the right of    2
4     3  to the right of    6
5     3  to the right of    8
6     3  to the right of    7
7     3  to the right of    0
8     3  to the right of    5
9     5  to the right of    7
10    5  to the right of    8
11    5   to the left of    3
12    6   to the left of    0
13    6   to the left of    3
14    6   to the left of    9
15    7   to the left of    3
16    7   to the left of    5
17    8   to the left of    5
18    8   to the left of    3
19    9  to the right of    6