Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_27319183_7 ( official_itv_rating__millions_ VARCHAR, episode VARCHAR )

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

### Accurate SQL ###

SELECT official_itv_rating__millions_ FROM table_27319183_7 WHERE episode = "Semi-final 5"