What is on the shelf to the right of the boy?
The books are on the shelf.
    src        edge_attr  dst
0     0   to the left of   20
1     0   to the left of    8
2     0   to the left of   25
3     2  to the right of   17
4     2   to the left of   16
..  ...              ...  ...
84   27  to the right of    9
85   27  to the right of    5
86   28   to the left of    4
87   28   to the left of    6
88   28  to the right of   13

[89 rows x 3 columns]