What is in front of the building?
The airport is in front of the building.
   src        edge_attr  dst
0    0            below    3
1    2               on    1
2    3             near    8
3    3      in front of    8
4    3            above    0
5    4   to the left of    9
6    7               of    3
7    8             near    3
8    8           behind    3
9    9  to the right of    4