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