What is the chain on?
The chain is on the ceiling.
    src        edge_attr  dst
0     1  to the right of   13
1     3   to the left of    8
2     3   to the left of   12
3     3   to the left of   10
4     3  to the right of    4
5     4   to the left of    3
6     4   to the left of   10
7     4   to the left of    8
8     4   to the left of   12
9     6          holding    8
10    6               on    0
11    7  to the right of   13
12    8     hanging from    0
13    8     hanging from    6
14    8  to the right of    3
15    8  to the right of    4
16    8  to the right of   13
17    9     hanging from   12
18   10  to the right of   13
19   10  to the right of    4
20   10  to the right of    3
21   11     hanging from   12
22   12  to the right of    4
23   12  to the right of    3
24   13   to the left of   10
25   13   to the left of    1
26   13   to the left of    8
27   13   to the left of    7