INPUT FILE: DATA/data.csv
This generated file contains the following columns:
1. user_keys: user_key
2. calendar_date: calendar date in date time format
3. buyFlag : whether the user bought a product
4. bcookie_activity: bcookie activity shown by the user

user_keys   calendar_date   buyFlag bcookie_activity
18427510294 2017-06-21      0       0
18427510294 2012-07-22      0       0
18427510294 2013-05-22      0       0
18427510294 2016-01-22      0       0
18427510294 2016-07-28      0       0
18427510294 2016-09-01      0       0
18427510294 2016-09-12      0       0
18427510294 2015-05-20      0       0
18427510294 2016-04-21      0       0
18427510294 2016-06-11      0       0