What is the piece of furniture that is square?
The piece of furniture is a chair.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    2
2     0   to the left of    7
3     0  to the right of    4
4     0  to the right of    1
..  ...              ...  ...
67   13   to the left of    2
68   14  to the right of    3
69   14  to the right of    5
70   14  to the right of   12
71   14  to the right of   13

[72 rows x 3 columns]