Is the white curtain to the left or to the right of the table?
The curtain is to the left of the table.
    src        edge_attr  dst
0     0  to the right of    2
1     0   to the left of    1
2     0   to the left of   12
3     0   to the left of    9
4     1  to the right of   10
..  ...              ...  ...
70   14   to the left of    9
71   14  to the right of    2
72   14   to the left of    1
73   15   to the left of    9
74   15  to the right of    2

[75 rows x 3 columns]