Table: extreme_makeover_home_edition
Columns: season
season_premiere
season_finale
tv_season
ranking
viewers_in_millions

Question: When did the season air where the viewership was 14.71 million?
SQL: SELECT "season_premiere" FROM extreme_makeover_home_edition WHERE "viewers_in_millions" = '14.71'

Question: What tv season had a season finale of august 18, 2004?
SQL: SELECT "tv_season" FROM extreme_makeover_home_edition WHERE "season_finale" = 'August 18, 2004'