1/1/2019

8/31/2019
-------------------80%

9/1/2019
10/31/2019


option 1:

ask user for the end date=8/31/2019, 7/31/2019.
take the rest of test data.
we need to also validate the test data contains 0, 1,2,3


option 2:

training dataframe 

test dataframe 
 verify test dataframe does not contain only 0, 
 we need to fair dist of 0, 1 2 3

Smart regression:

ask user, but we can use the default.

