The problem: Answer a question about this article:
The band had a number of bass players during this period who did not fit with the band's chemistry. It was not until February 1971 that they settled on John Deacon and began to rehearse for their first album. They recorded four of their own songs, "Liar", "Keep Yourself Alive", "The Night Comes Down" and "Jesus", for a demo tape; no record companies were interested. It was also around this time Freddie changed his surname to "Mercury", inspired by the line "Mother Mercury, look what they've done to me" in the song "My Fairy King". On 2 July 1971, Queen played their first show in the classic line-up of Mercury, May, Taylor and Deacon at a Surrey college outside London.
What did Freddie from Queen change his last name to?
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The answer: Mercury


The problem: Answer a question about this article:
Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.
The layout engine, rendering engine, user interface and other things are components that offer different what of web browsers?
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The answer: functionalities


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An alloy of aluminium and gallium in pellet form added to water can be used to generate hydrogen. The process also produces alumina, but the expensive gallium, which prevents the formation of an oxide skin on the pellets, can be re-used. This has important potential implications for a hydrogen economy, as hydrogen can be produced on-site and does not need to be transported.
What can be reused after the formation?
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The answer: the expensive gallium


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Tobacco was one of the first major industries to develop after the Civil War. Many farmers grew some tobacco, and the invention of the cigarette made the product especially popular. Winston-Salem is the birthplace of R. J. Reynolds Tobacco Company (RJR), founded by R. J. Reynolds in 1874 as one of 16 tobacco companies in the town. By 1914 it was selling 425 million packs of Camels a year. Today it is the second-largest tobacco company in the U.S. (behind Altria Group). RJR is an indirect wholly owned subsidiary of Reynolds American Inc., which in turn is 42% owned by British American Tobacco.
The invention of cigarettes made what popular?
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The answer:
Tobacco