Are the people male?
No, they are both male and female.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of   13
2     0   to the left of    8
3     0   to the left of    9
4     1  to the right of    8
5     2  to the right of    0
6     3   to the left of    8
7     4   to the left of   13
8     4   to the left of    8
9     6  to the right of   11
10    7   to the left of    8
11    8  to the right of    3
12    8  to the right of    4
13    8   to the left of    1
14    8  to the right of    0
15    8  to the right of    7
16    9  to the right of    0
17   11   to the left of    6
18   11   to the left of   12
19   12  to the right of   11
20   13  to the right of    0
21   13  to the right of    4