This guide tells us how categories should be used properly
[Job] [Position] [Country] [Club] [Others] [Year of birth] Ex. Manager, Forward, England, Manchester City, Former Barcelona players, Frontmen, 1998 births
[National Teams/Clubs] [Country] [League] [Other Leagues] [Others] [Year of establishment] Ex. English clubs, Premier League, 2018-2019 Europa League, Champions League winners, 1901 foundings
[Cups/Leagues], [Continent/Country] Ex. Leagues, Europe
[League Name] [Year] Champions League seasons, 2020-2021 seasons