What is in front of the building?
The meter is in front of the building.
   src        edge_attr  dst
0    1   to the left of    6
1    1           behind    2
2    2      in front of    1
3    2   to the left of    9
4    3   to the left of   10
5    6  to the right of    1
6    9  to the right of    2
7   10  to the right of    3