Question: When was the episode with a 999,000 BARB rating first aired in Denmark?
Schema: create table table_26591309_3 (first_broadcast_denmark___dr1__ varchar, official_barb_ratings varchar, PRIMARY KEY (first_broadcast_denmark___dr1__))
SQL: select first_broadcast_denmark___dr1__ from table_26591309_3 where official_barb_ratings = "999,000"