Is there any fence in front of the building?
No, there is a man in front of the building.
    src        edge_attr  dst
0     0   to the left of    9
1     1   to the left of    2
2     1   to the left of   10
3     2   to the left of   20
4     2  to the right of    1
..  ...              ...  ...
64   19   to the left of   16
65   19   to the left of   18
66   20  to the right of    2
67   20  to the right of    7
68   20   to the left of    9

[69 rows x 3 columns]