user: Question: What is the BARB ratings of episode 6?
Columns: ['Episode', 'First broadcast Denmark ( DR1 )', 'Official TNS Gallup ratings', 'First broadcast UK ( BBC Four )', 'Official BARB ratings']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [1.0, '23 September 2012', 1678000.0, '17 November 2012', '1,264,000']
SQL:

assistant: SELECT "Official BARB ratings" FROM "Table" WHERE "Episode" = 6.0;