When did the season air where the viewership was 14.71 million?
{'header': ['Season', 'Season premiere', 'Season finale', 'TV season', 'Ranking', 'Viewers (in millions)'], 'page_title': 'Extreme Makeover: Home Edition', 'section_title': 'American television ratings', 'caption': 'American television ratings', 'rows': [['1', 'December 3, 2003', 'August 18, 2004', '2003–2004', '#41', '10.63'], ['2', 'September 26, 2004', 'May 22, 2005', '2004–2005', '#15', '15.75'], ['3', 'August 14, 2005', 'May 16, 2006', '2005–2006', '#19', '14.71'], ['4', 'September 17, 2006', 'May 20, 2007', '2006–2007', '#25', '13.15'], ['5', 'September 30, 2007', 'May 18, 2008', '2007–2008', '#22', '12.89'], ['6', 'September 28, 2008', 'May 17, 2009', '2008–2009', '#38', '10.26'], ['7', 'September 27, 2009', 'May 16, 2010', '2009–2010', '#39', '9.11'], ['8', 'September 26, 2010', 'May 15, 2011', '2010–2011', '#50', '8.53'], ['9', 'September 25, 2011', 'January 13, 2012', '2011–2012', '#101', '5.83']]}