Table: ept_tournament
Columns: date
city
event
winner
prize

Question: What is the Date, when the Winner is Aaron Gustavson?
SQL: SELECT "date" FROM ept_tournament WHERE "winner" = 'aaron gustavson'

Question: What is the Date, when the City is Warsaw?
SQL: SELECT "date" FROM ept_tournament WHERE "city" = 'warsaw'

Question: What is the Prize, when the Winner is Aaron Gustavson?
SQL: SELECT "prize" FROM ept_tournament WHERE "winner" = 'aaron gustavson'

Question: Who is the Winner, when the City is Berlin?
SQL: SELECT "winner" FROM ept_tournament WHERE "city" = 'berlin'