Is the shelf to the left of the box?
No, the shelf is to the right of the box.
     src        edge_attr  dst
0      0   to the left of   20
1      0   to the left of   13
2      0   to the left of   12
3      0  to the right of   17
4      0   to the left of   16
..   ...              ...  ...
114   28  to the right of   27
115   28  to the right of   26
116   29   to the left of   10
117   29   to the left of   21
118   29   to the left of   22

[119 rows x 3 columns]