On which side is the book?
The book is on the left of the image.
     src        edge_attr  dst
0      0  to the right of   19
1      0  to the right of   22
2      0  to the right of   21
3      0   to the left of   12
4      0   to the left of    9
..   ...              ...  ...
123   26   to the left of   23
124   26   to the left of   25
125   26   to the left of   24
126   26   to the left of    6
127   27  to the right of   22

[128 rows x 3 columns]