Problem: There are many geological issues concerning the rivers and streams of the Appalachians. In spite of the existence of the Great Appalachian Valley, many of the main rivers are transverse to the mountain system axis. The drainage divide of the Appalachians follows a tortuous course which crosses the mountainous belt just north of the New River in Virginia. South of the New River, rivers head into the Blue Ridge, cross the higher Unakas, receive important tributaries from the Great Valley, and traversing the Cumberland Plateau in spreading gorges (water gaps), escape by way of the Cumberland River and the Tennessee River rivers to the Ohio River and the Mississippi River, and thence to the Gulf of Mexico. In the central section, north of the New River, the rivers, rising in or just beyond the Valley Ridges, flow through great gorges to the Great Valley, and then across the Blue Ridge to tidal estuaries penetrating the coastal plain via the Roanoke River, James River, Potomac River, and Susquehanna River.
What is north of the Potomac River?
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Answer: unanswerable

Problem: The politics of Zhejiang is structured in a dual party-government system like all other governing institutions in Mainland China. The Governor of Zhejiang is the highest-ranking official in the People's Government of Zhejiang. However, in the province's dual party-government governing system, the Governor is subordinate to the Zhejiang Communist Party of China (CPC) Provincial Committee Secretary, colloquially termed the "Zhejiang CPC Party Chief".
What is the Zhejiang Communist Party of China (CPC) Provincial Committee Secretary provincially known as?
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Answer: Zhejiang CPC Party Chief

Problem: In 1940, Winston Churchill replaced Neville Chamberlain as Prime Minister, though personally George would have preferred to appoint Lord Halifax. After the King's initial dismay over Churchill's appointment of Lord Beaverbrook to the Cabinet, he and Churchill developed "the closest personal relationship in modern British history between a monarch and a Prime Minister". Every Tuesday for four and a half years from September 1940, the two men met privately for lunch to discuss the war in secret and with frankness.
Who was Winston Churchill's predecessor?
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Answer:
Neville Chamberlain