Are there any books on the bookshelf made of wood?
No, there is a box on the bookshelf.
     src        edge_attr  dst
0      0  to the right of    1
1      0  to the right of   25
2      0  to the right of   26
3      0  to the right of   12
4      0  to the right of   16
..   ...              ...  ...
112   26   to the left of   20
113   26   to the left of    2
114   26   to the left of   19
115   26   to the left of    0
116   26  to the right of    3

[117 rows x 3 columns]