Which kind of furniture isn't open?
The furniture is a shelf.
    src        edge_attr  dst
0     1   to the left of    8
1     1   to the left of   11
2     2  to the right of   17
3     2   to the left of    9
4     2  to the right of   21
..  ...              ...  ...
91   21   to the left of    3
92   21   to the left of   13
93   21  to the right of   16
94   21  to the right of   17
95   21   to the left of    9

[96 rows x 3 columns]