On which side of the picture are the glasses?
The glasses are on the left of the image.
    src        edge_attr  dst
0     0   to the left of    8
1     1   to the left of   21
2     1   to the left of    6
3     2  to the right of   13
4     2   to the left of    8
..  ...              ...  ...
81   22   to the left of   18
82   22  to the right of    6
83   24               of   24
84   24   to the left of    6
85   24  to the right of    5

[86 rows x 3 columns]