user: Question: What is the Official ITV1 rating for Auditions 4?
Columns: ['Episode', 'Air date', 'Official ITV1 rating', 'Weekly rank', 'Share']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Auditions 1', '16 August', 10.78, '1', '48.2%']
SQL:

assistant: SELECT "Official ITV1 rating" FROM "Table" WHERE "Episode" = 'Auditions 4';