Are these people all of the same gender?
No, they are both male and female.
     src        edge_attr  dst
0      0  to the right of   18
1      0  to the right of   10
2      1   to the left of   11
3      1   to the left of    8
4      1   to the left of    9
..   ...              ...  ...
123   21       sitting on   22
124   21   to the left of   18
125   22   to the left of   23
126   22  to the right of    6
127   23  to the right of   22

[128 rows x 3 columns]