Is the bookcase made of the same material as the chair?
Yes, both the bookcase and the chair are made of wood.
    src       edge_attr  dst
0     0  to the left of   14
1     0  to the left of    5
2     0  to the left of   12
3     1  to the left of    5
4     1  to the left of   14
..  ...             ...  ...
72   19  to the left of   16
73   19  to the left of   14
74   19  to the left of   12
75   19  to the left of    5
76   19  to the left of    2

[77 rows x 3 columns]