[Q]: Sentence: A regular Gregorian year consists of 365 days, but as in the Julian calendar, in a leap year, a leap day is added to February. Question: How often is a leap day added to the Julian calendar year?
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[A]: no

[Q]: Sentence: USB mice and keyboards can usually be used with older computers that have PS/2 connectors with the aid of a small USB-to-PS/2 adapter. Question: What connects PS/2 keyboards and mice to a USB port?
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[A]: no

[Q]: Sentence: The Korean War (in South Korean Hangul: , Hanja: , Hanguk Jeonjaeng, "Korean War"; in North Korean Chosungul: , Joguk Haebang Jeonjaeng, "Fatherland Liberation War"; 25 June 1950 27 July 1953)[a] was started when North Korea invaded South Korea. Question: In what year did the Korean War begin?
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[A]:
yes