human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Episode, Date, Official ITV1 rating (millions), Weekly rank, Share (%), Official ITV1 HD rating (millions), Total ITV1 viewers (millions)
###Question: What was the official ITV1 HD rating in millions for the episode that had an official ITV1 rating of 8.98 million?
gpt
SELECT Official ITV1 HD rating (millions) FROM table WHERE Official ITV1 rating (millions) = 8.98