Individualid	Familyid	Gender	Mother	Father
1	cs_002	m	.	.
2	cs_002	f	.	.
3	cs_002	f	2	1
4	cs_002	m	.	.
5	cs_002	m	2	1
6	cs_002	m	2	1
7	cs_002	m	3	4
8	cs_002	f	3	4
9	cs_002	f	8	5
10	cs_002	m	8	5
11	cs_002	f	9	7