[Q]: Sentence: From the definition of the conventional watt W90, this gives a measure of the product KJ2RK in SI units, where RK is the von Klitzing constant which appears in the quantum Hall effect. Question: What value does RK represent?
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[A]: yes

[Q]: Sentence: Some succeeded their fathers as rulers, such as Sultan Ahmad al-Mansur, who ruled Morocco from 1578 to 1608. Question: When did Sultan Ahmad al-Mansur rule?
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[A]: yes

[Q]: Sentence: Over a period of 18 years, the Bell Telephone Company faced 587 court challenges to its patents, including five that went to the U.S. Supreme Court, but none was successful in establishing priority over the original Bell patent and the Bell Telephone Company never lost a case that had proceeded to a final trial stage. Question: How many of the court cases wound up at the Supreme Court?
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[A]:
yes