[Q]: Sentence: After Dong Zhuo demoted Emperor Shao and promoted his brother Liu Xie as Emperor Xian, Yuan Shao led a coalition of former officials and officers against Dong, who burned Luoyang to the ground and resettled the court at Chang'an in May 191 AD. Question: How was Luoyang destroyed?
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[A]: yes

[Q]: Sentence: The Yellow River split into two new branches: one emptying to the north and the other to the south of the Shandong Peninsula, though Han engineers managed to dam the southern branch by 70 AD. Question: What caused the water level in the Yellow River to increase?
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[A]: no

[Q]: Sentence: ISPs with more than one point of presence (PoP) may have separate connections to an upstream ISP at multiple PoPs, or they may be customers of multiple upstream ISPs and may have connections to each one of them at one or more point of presence. Question: What is the simplest case of an ISP using an upstream ISP?
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[A]:
no