Here is a question about this article: Indigenous Australians have been referred to as "black people" in Australia since the early days of European settlement. While originally related to skin colour, the term is used to today to indicate Aboriginal or Torres Strait Islander ancestry in general and can refer to people of any skin pigmentation.
What is the answer to this question: Who has been referred to as "black people"?
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So... Indigenous Australians

Here is a question about this article: Britain's first use of brass occurred around the 3rd2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing in South America, particularly in Peru around 1000 AD; it proceeded at a much slower rate on other continents. Copper burial ornamentals from the 15th century have been uncovered, but the metal's commercial production did not start until the early 20th century.
What is the answer to this question: When did commercial production of copper begin?
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So... early 20th century

Here is a question about this article: An earlier draft of To Kill a Mockingbird, titled Go Set a Watchman, was controversially released on July 14, 2015. This draft, which was completed in 1957, is set 20 years after the time period depicted in To Kill a Mockingbird but is not a continuation of the narrative. This earlier version of the story follows an adult Scout Finch who travels from New York to visit her father, Atticus Finch, in Maycomb, Alabama, where she is confronted by the intolerance in her community. The Watchman manuscript was believed to have been lost until Lee's lawyer Tonja Carter discovered it; although this claim has been widely disputed. Watchman contains early versions of many of the characters from To Kill a Mockingbird. According to Lee's agent Andrew Nurnberg, Mockingbird was originally intended to be the first book of a trilogy: "They discussed publishing Mockingbird first, Watchman last, and a shorter connecting novel between the two." This assertion has been discredited however by the rare books expert James S. Jaffe, who reviewed the pages at the request of Lee's attorney and found them to be only another draft of "To Kill a Mockingbird". The statement was also contrary to Jonathan Mahler's description of how "Watchman" was seen as just the first draft of "Mockingbird". Instances where many passages overlap between the two books, in some case word for word, also refutes this assertion.
What is the answer to this question: Go Set a Watchman was finished in what year?
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So...
1957