Is the building covered by the roof?
Yes, the building is covered by the roof.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of   11
2     0  to the right of    5
3     0   to the left of   18
4     0   to the left of   19
..  ...              ...  ...
72   19  to the right of    8
73   19  to the right of    7
74   19  to the right of    0
75   19  to the right of    5
76   19  to the right of    2

[77 rows x 3 columns]