_id	user_id	sex	train
1	user01	0	1
2	user02	0	1
3	user03	1	1
4	user04	1	1
5	user05	1	1
6	user06	0	1
7	user07	0	1
8	user08	1	0
9	user09	0	1
10	user10	1	1
11	user11	0	1
12	user12	0	0
13	user13	0	0
14	user14	1	0