Is the tower on top of the brown building?
Yes, the tower is on top of the building.
   src        edge_attr  dst
0    3  to the right of    5
1    3  to the right of    4
2    4  to the right of    5
3    4   to the left of    3
4    5   to the left of    4
5    5   to the left of    3
6    6        on top of    1