What is common to the bench and the building?
The material, both the bench and the building are wooden.
    src        edge_attr  dst
0     5           behind   10
1     5   to the left of    6
2     6  to the right of   10
3     6   to the left of    8
4     6   to the left of   13
5     6   to the left of    7
6     6  to the right of    5
7     7  to the right of    6
8     8  to the right of    6
9     8   to the left of   13
10   10      in front of    5
11   10   to the left of    6
12   13               on    7
13   13  to the right of    6
14   13  to the right of    8