Are the post and the crate made of the same material?
Yes, both the post and the crate are made of wood.
     src        edge_attr  dst
0      0  to the right of   13
1      0  to the right of   10
2      1  to the right of   10
3      1  to the right of    6
4      1  to the right of   14
..   ...              ...  ...
105   22   to the left of   13
106   22   to the left of    9
107   22  to the right of   19
108   22  to the right of    4
109   22   to the left of   16

[110 rows x 3 columns]