On which side of the picture are the boxes?
The boxes are on the right of the image.
     src        edge_attr  dst
0      0  to the right of   48
1      0  to the right of    8
2      0   to the left of   26
3      0   to the left of   16
4      1  to the right of    6
..   ...              ...  ...
544   56  to the right of   29
545   56   to the left of   38
546   56  to the right of   33
547   56  to the right of   48
548   56  to the right of   21

[549 rows x 3 columns]