Are the papers to the right of a book?
No, the papers are to the right of a man.
     src        edge_attr  dst
0      0  to the right of   13
1      0  to the right of   21
2      0  to the right of    9
3      0  to the right of    6
4      1  to the right of   22
..   ...              ...  ...
110   22   to the left of   20
111   23   to the left of   19
112   23   to the left of   10
113   23   to the left of    6
114   23   to the left of    2

[115 rows x 3 columns]