What are the books on?
The books are on the shelves.
     src        edge_attr  dst
0      0  to the right of   14
1      0   to the left of    4
2      0  to the right of   11
3      1             near   17
4      1   to the left of   15
..   ...              ...  ...
119   20        on top of   10
120   20  to the right of    6
121   20  to the right of   17
122   20  to the right of   15
123   20  to the right of   18

[124 rows x 3 columns]