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

### Instruction:
What were the official itv ratings in millions for semi-final 5?

### Inputs:
table_name: table, columns: ['Episode', 'Date', 'Official ITV rating (millions)', 'Weekly rank', 'Share (%)', 'Official ITV HD rating (millions)', 'Total ITV viewers (millions)']

### Response:
SELECT Official ITV rating (millions) FROM table WHERE Episode = Semi-final 5