What is in front of the fence?
The bench is in front of the fence.
   src        edge_attr  dst
0    0               of    3
1    3               on    1
2    3      in front of    4
3    4  to the right of    5
4    4           behind    3
5    5               on    4
6    5   to the left of    4
7    6   to the left of    9
8    8               of    3
9    9  to the right of    6