Which kind of furniture is the window behind of?
The window is behind the desk.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of   18
2     0           behind    7
3     0           behind   14
4     1          next to   15
..  ...              ...  ...
67   18   to the left of    0
68   19   to the left of    8
69   19   to the left of   16
70   19   to the left of    5
71   19               on   14

[72 rows x 3 columns]