What is the book on?
The book is on the table.
    src        edge_attr  dst
0     0  to the right of   11
1     0               on    4
2     0   to the left of   10
3     0   to the left of    9
4     0   to the left of    5
..  ...              ...  ...
62   18   to the left of    7
63   18   to the left of   13
64   18               on   16
65   18   to the left of    2
66   18   to the left of    4

[67 rows x 3 columns]