What is the window made of?
The window is made of metal.
   src        edge_attr  dst
0    0               on    8
1    0  to the right of    4
2    0  to the right of    2
3    0  to the right of    7
4    2   to the left of    0
5    4               on    3
6    4   to the left of    0
7    5             near    8
8    7   to the left of    0
9    8          next to    5