CREATE TABLE table_name_69 (league_from VARCHAR2, nhl_team VARCHAR2)

From which league is the player chosen by the Atlanta Thrashers (from Dallas) 6?
SELECT league_from FROM table_name_69 WHERE nhl_team = "atlanta thrashers (from dallas) 6"
SELECT "league_from" FROM "table_name_69" WHERE "atlanta thrashers (from dallas) 6" = "nhl_team"