What is common to the sign and the building?
The material, both the sign and the building are wooden.
     src        edge_attr  dst
0      0   to the left of    7
1      0  to the right of    5
2      0   to the left of   16
3      0   to the left of    6
4      0   to the left of    2
..   ...              ...  ...
103   18  to the right of   17
104   18   to the left of   15
105   19   to the left of   10
106   19   to the left of   17
107   20   to the left of   17

[108 rows x 3 columns]