Problem: In additive color devices such as computer displays and televisions, one of the primary light sources is typically a narrow-spectrum yellowish-green of dominant wavelength ~550 nm; this "green" primary is combined with an orangish-red "red" primary and a purplish-blue "blue" primary to produce any color in between the RGB color model. A unique green (green appearing neither yellowish nor bluish) is produced on such a device by mixing light from the green primary with some light from the blue primary.
What is produced on a computer display when light from the green primary is mixed with some light from the blue primary?
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Answer: A unique green

Problem: Alan Dershowitz described Sudan as an example of a government that "actually deserve(s)" the appellation "apartheid." Former Canadian Minister of Justice Irwin Cotler echoed the accusation.
How did Alan Dershozitz describe the Sudan?
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Answer: an example of a government that "actually deserve(s)" the appellation "apartheid."

Problem: It was principally the widespread introduction of a single feature, the pointed arch, which was to bring about the change that separates Gothic from Romanesque. The technological change permitted a stylistic change which broke the tradition of massive masonry and solid walls penetrated by small openings, replacing it with a style where light appears to triumph over substance. With its use came the development of many other architectural devices, previously put to the test in scattered buildings and then called into service to meet the structural, aesthetic and ideological needs of the new style. These include the flying buttresses, pinnacles and traceried windows which typify Gothic ecclesiastical architecture. But while pointed arch is so strongly associated with the Gothic style, it was first used in Western architecture in buildings that were in other ways clearly Romanesque, notably Durham Cathedral in the north of England, Monreale Cathedral and Cathedral of Cefalu in Sicily, Autun Cathedral in France.
What is the name of the cathedral in Northern England that first displayed the use of the pointed arch?
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Answer:
Durham Cathedral