What are the pillows on, a bookcase or a bed?
The pillows are on a bed.
    src        edge_attr  dst
0     0   to the left of   15
1     0  to the right of    2
2     0           behind   17
3     0  to the right of    1
4     0   to the left of   14
..  ...              ...  ...
80   17   to the left of   14
81   17   to the left of   15
82   18               on   15
83   18  to the right of   14
84   18  to the right of   10

[85 rows x 3 columns]