How big is the sandwich?
The sandwich is large.
    src  edge_attr  dst
0     0       with    2
1     0  on top of    5
2     0       near    6
3     0         on    5
4     1         on    4
5     2         on    0
6     4      below    5
7     4      under    5
8     5         on    4
9     5      above    4
10    6  on top of    5
11    6         on    5
12    6       near    0