What is the man in front of?
The man is in front of the fence.
   src        edge_attr  dst
0    5               in    2
1    6           behind    8
2    8               in    2
3    8          wearing    4
4    8          wearing    3
5    8      in front of    6
6   11  to the right of   12
7   12   to the left of   11