What is common to the bench and the desk?
The material, both the bench and the desk are wooden.
   src        edge_attr  dst
0    1  to the right of    2
1    2  to the right of    7
2    2  to the right of    6
3    2   to the left of    1
4    6   to the left of    2
5    6   to the left of    7
6    7   to the left of    2
7    7  to the right of    6