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