What is the banana on?
The banana is on the apple.
    src        edge_attr  dst
0     0   to the left of    1
1     0      in front of    2
2     0   to the left of    3
3     1               on    3
4     1  to the right of    0
5     2               on    1
6     2           behind    0
7     2           behind    3
8     3      in front of    2
9     3             with    1
10    3  to the right of    0