Does the ceiling have the same material as the post?
Yes, both the ceiling and the post are made of wood.
    src        edge_attr  dst
0     0           behind    3
1     1   to the left of    7
2     2  to the right of    6
3     3               on    0
4     3   to the left of    7
5     3      in front of    0
6     3             near    7
7     5   to the left of    7
8     6   to the left of    2
9     6   to the left of    7
10    7             near    3
11    7  to the right of    6
12    7  to the right of    9
13    7  to the right of    8
14    7  to the right of    1
15    7  to the right of    5
16    7  to the right of    3
17    7  to the right of   11
18    7  to the right of   10
19    8   to the left of    7
20    8               on    3
21    9               on    3
22    9   to the left of    7
23   10   to the left of    7
24   11   to the left of    7