user: Question: Who was the radio 1 presenter for the broadcast that had 9.73 million viewers? 
Columns: ['Episode', 'Broadcast Date', 'BBC One Presenter(s)', 'Starring', 'Radio 1 Presenter', 'Viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 2005.0, 'Clare Balding', 'Doug Segal', 'N/A', '6.43']
SQL:

assistant: SELECT "Radio 1 Presenter" FROM "Table" WHERE "Viewers (millions)" = '9.73';