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

### Instruction:
Name the total number of panelists for 19 january 2007

### Inputs:
table_name: table, columns: ['Episode Number', 'Air Date', 'Guest Host', 'Musical Guest (Song performed)', 'Who knows the most about the guest host? panelists', 'Coat Of Cash Wearing Celebrity']

### Response:
SELECT COUNT Who knows the most about the guest host? panelists FROM table WHERE Air Date = 19 January 2007