[Haskell-beginners] Looking for a data structure

Hi, I'm looking for how best to represent selections from a set of items. For example, consider a soccer/football type game. You would have a Player data type. The game would store a player pool of all players in that game. Each club will have a number of players from that player pool, each match will involve that club selecting a number of players from its list of players. What is the best way to structure this data and hopefully at the type level enforce this subset type relationship? Thanks, Levi