What is the flag on?
The flag is on the house.
   src        edge_attr  dst
0    1               on    3
1    2  to the right of    6
2    4             near    6
3    5               on    1
4    5           riding    1
5    6               on    1
6    6           riding    1
7    6   to the left of    2
8    6             near    4
9    7               on    0