What is in the glass?
The curtain is in the glass.
    src        edge_attr  dst
0     0      in front of    5
1     0  to the right of   14
2     0  to the right of    2
3     0  to the right of    1
4     0  to the right of    4
..  ...              ...  ...
66   15               in    7
67   15  to the right of    4
68   15  to the right of    5
69   15  to the right of    8
70   15  to the right of    6

[71 rows x 3 columns]