The tomato is on what?
The tomato is on the burger.
   src        edge_attr  dst
0    0   to the left of    3
1    2               in    1
2    3  to the right of    5
3    3  to the right of    0
4    4             with   11
5    5   to the left of    3
6    5               on   11
7    9           behind   11
8   11               on    4
9   11      in front of    9