Is the man to the left or to the right of the book on the right side?
The man is to the left of the book.
    src        edge_attr  dst
0     0  to the right of   12
1     0  to the right of    4
2     0  to the right of   10
3     1   to the left of    3
4     2   to the left of   13
..  ...              ...  ...
76   16   to the left of   13
77   16   to the left of   11
78   16   to the left of    9
79   17  to the right of    9
80   17  to the right of   13

[81 rows x 3 columns]