"id"	"age"	"death"	"gender"
1	50	1	1
1	63	0	2
2	49	0	1
2	52	1	2
3	56	0	1
3	70	0	2
4	68	1	1
4	75	1	2
5	74	0	1
5	72	1	2
6	69	0	1
6	69	0	2
7	70	0	1
7	70	0	2
8	67	1	1
8	70	0	2
9	74	0	1
9	74	0	2
10	81	0	1
10	81	0	2
11	61	1	1
11	58	1	2
12	75	0	1
12	73	0	2