Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Who was the radio 1 presenter for the broadcast that had 9.73 million viewers?

### Inputs:
table_name: table, columns: ['Episode', 'Broadcast Date', 'BBC One Presenter(s)', 'Starring', 'Radio 1 Presenter', 'Viewers (millions)']

### Response:
SELECT Radio 1 Presenter FROM table WHERE Viewers (millions) = 9.73