Problem: Which colour lies between red and yellow in the visible spectrum
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A: orange

Problem: Oak Ridge, Tennessee is widely associated with what?
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A: manhattan project

Problem: Whose 'heroic' performance at the German Reichstag in 1987 is considered a catalyst for the fall of the Berlin Wall 1989/90?
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A: david bowie

Problem: Name the popular illegal filesharing website found liable for copyright breach by a New York court in October 2010?
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A:
limewire