Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
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Question: Who had a hit single in the seventies with `I Wish It Could Be Christmas Everyday`?

Answer: wizzard


Question: Which London Underground line connects Euston and Waterloo?

Answer: northern line


Question: The Ghost Road by Pat Barker, which won the Booker Prize in 1995, is the third volume in which trilogy?

Answer:
regeneration trilogy