i would like to know whether we test the data on basis of years or is there any other way...? i have taken the train data according to the following method: if the person Lapsed in 2018 then i am considering it as [[2017,0],[2018,1][2019,1]],and the people who didnt Lapse is [[2017,0],[2018,0][2019,0]] where as test data is [[2020,?]] is this correct? ThankYou!