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

### Instruction:
How many individuals watched the show that had a bbc ranking of 6?

### Inputs:
table_name: table, columns: ['Episode no.', 'Airdate', 'Viewers', 'BBC Three weekly ranking', 'Cable rank']

### Response:
SELECT COUNT Viewers FROM table WHERE BBC Three weekly ranking = 6