What is on the wood shelf?
The book is on the shelf.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    2
2     0  to the right of   12
3     0  to the right of    5
4     1   to the left of   12
..  ...              ...  ...
85   13  to the right of    9
86   13  to the right of    4
87   13   to the left of    5
88   13  to the right of    8
89   13  to the right of   10

[90 rows x 3 columns]