On what is the wood bench sitting?
The bench is sitting on the dirt.
   src        edge_attr  dst
0    1   to the left of    6
1    1   to the left of    2
2    2       sitting on    8
3    2            above    8
4    2  to the right of    1
5    6               of    2
6    6  to the right of    1
7    8            under    2