Who is standing?
The men are standing.
    src  edge_attr  dst
0     0         on    2
1     0      above    2
2     0       near    3
3     0     beside    3
4     1      above    2
5     1         on    2
6     2      below    3
7     3     beside    0
8     3  on top of    2
9     3         on    2
10    3       near    0