Table: copenhagen_player_data
Columns: nat
name
moving_to
type
transfer_window
transfer_fee
source

Question: What player is associated with soenderjyske.dk?
SQL: SELECT "name" FROM copenhagen_player_data WHERE "source" = 'soenderjyske.dk'

Question: What is the transfer fee for Gravgaard?
SQL: SELECT "transfer_fee" FROM copenhagen_player_data WHERE "type" = 'transfer' AND "name" = 'gravgaard'