In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Q: Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula N 2O. At room temperature, it is a colorless non-flammable gas, with a slightly metallic scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen.

A: what is the chemical formula of laughing gas
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Q: Caine played Ebenezer Scrooge in The Muppet Christmas Carol (1992). This was his first starring role in several years, which led to a career resurgence in the late 1990s, receiving his second Golden Globe Award for his performance in Little Voice in 1998 and receiving his second Academy Award for Best Supporting Actor for The Cider House Rules the following year. Caine played Nigel Powers in the 2002 parody Austin Powers in Goldmember, and Alfred Pennyworth in Christopher Nolan's The Dark Knight Trilogy. He appeared in several other of Nolan's films including The Prestige (2006), Inception (2010), Interstellar (2014) and a minor (voice-only) role in Dunkirk (2017). He also appeared as a supporting character in Alfonso Cuarón's Children of Men and Pixar's 2011 film Cars 2. As of February 2017, films in which he has starred have grossed over $3.5 billion domestically and over $7.8 billion worldwide. Caine is ranked as the twelfth highest grossing box office star.

A: who played alfred in batman the dark knight
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Q: Old Major (also called Willingdon Beauty, his name used when showing) is the first major character described by George Orwell in Animal Farm. This 'purebred' of pigs is a kind, grandfatherly philosopher of change.

A:
who is the old major in animal farm
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