Are the stairs made of the same material as the drawers?
Yes, both the stairs and the drawers are made of wood.
    src        edge_attr  dst
0     2  to the right of    7
1     3   to the left of    4
2     3   to the left of    9
3     3   to the left of    7
4     4   to the left of    6
5     4   to the left of    8
6     4  to the right of    7
7     4  to the right of    9
8     4  to the right of    3
9     5       hanging on    1
10    6  to the right of    4
11    7   to the left of    2
12    7  to the right of    3
13    7   to the left of    4
14    8  to the right of    4
15    9   to the left of    4
16    9  to the right of    3