What is common to the box and the crate?
The material, both the box and the crate are wooden.
    src        edge_attr  dst
0     1  to the right of    5
1     1  to the right of    4
2     1  to the right of    3
3     2  to the right of    4
4     2  to the right of    5
5     2  to the right of    8
6     2  to the right of    3
7     3   to the left of    2
8     3   to the left of    1
9     3   to the left of    7
10    4   to the left of    1
11    4   to the left of    2
12    5   to the left of    1
13    5   to the left of    2
14    6   to the left of    7
15    7  to the right of    6
16    7  to the right of    3
17    8   to the left of    2