Problem: Hunter-gatherer:

The transition from hunting and gathering to agriculture is not necessarily a one way process. It has been argued that hunting and gathering represents an adaptive strategy, which may still be exploited, if necessary, when environmental change causes extreme food stress for agriculturalists. In fact, it is sometimes difficult to draw a clear line between agricultural and hunter-gatherer societies, especially since the widespread adoption of agriculture and resulting cultural diffusion that has occurred in the last 10,000 years.[citation needed] This anthropological view has remained unchanged since the 1960s.[clarification needed][citation needed]

What change from hunting and gathering to agriculture is not easy to mark?
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A: transition

Problem: In the early 20th century, Japanese breeders began to selectively breed for increased egg production. By 1940, the quail egg industry was flourishing, but the events of World War II led to the complete loss of quail lines bred for their song type, as well as almost all of those bred for egg production. After the war, the few surviving domesticated quail were used to rebuild the industry, and all current commercial and laboratory lines are considered to have originated from this population. Modern birds can lay upward of 300 eggs a year and countries such as Japan, India, China, Italy, Russia, and the United States have established commercial Japanese quail farming industries. Japanese quail are also used in biomedical research in fields such as genetics, embryology, nutrition, physiology, pathology, and toxicity studies. These quail are closely related to the common quail, and many young hybrid birds are released into the wild each year to replenish dwindling wild populations.
When did the quail egg business begin to really become an economic driven industry?
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Answer: By 1940, the quail egg industry was flourishing,

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
From 9 February for two days his coffin rested in St. Mary Magdalene Church, Sandringham, before lying in state at Westminster Hall from 11 February. His funeral took place at St. George's Chapel, Windsor Castle, on the 15th. He was interred initially in the Royal Vault until he was transferred to the King George VI Memorial Chapel inside St. George's on 26 March 1969. In 2002, fifty years after his death, the remains of his widow, Queen Elizabeth The Queen Mother, and the ashes of his younger daughter Princess Margaret, who both died that year, were interred in the chapel alongside him.
In what city is Westminster Hall?
A: unanswerable

Context and question: Above the sessions exist presbyteries, which have area responsibilities. These are composed of teaching elders and ruling elders from each of the constituent congregations. The presbytery sends representatives to a broader regional or national assembly, generally known as the General Assembly, although an intermediate level of a synod sometimes exists. This congregation / presbytery / synod / general assembly schema is based on the historical structure of the larger Presbyterian churches, such as the Church of Scotland or the Presbyterian Church (U.S.A.); some bodies, such as the Presbyterian Church in America and the Presbyterian Church in Ireland, skip one of the steps between congregation and General Assembly, and usually the step skipped is the Synod. The Church of Scotland has now abolished the Synod.[citation needed]
Which group from the Presbyterian church in rank is above sessions?
Answer: presbyteries

Question: Angels in the Outfield was Eisenhower's favorite movie. His favorite reading material for relaxation were the Western novels of Zane Grey. With his excellent memory and ability to focus, Eisenhower was skilled at card games. He learned poker, which he called his "favorite indoor sport," in Abilene. Eisenhower recorded West Point classmates' poker losses for payment after graduation, and later stopped playing because his opponents resented having to pay him. A classmate reported that after learning to play contract bridge at West Point, Eisenhower played the game six nights a week for five months.
Is there an answer to this question: What genre did Zane Grey write in?

Answer: Western

Problem: Modern history:

The campaigns of French Emperor and General Napoleon Bonaparte characterized the Napoleonic Era. Born on Corsica as the French invaded, and dying suspiciously on the tiny British Island of St. Helena, this brilliant commander, controlled a French Empire that, at its height, ruled a large portion of Europe directly from Paris, while many of his friends and family ruled countries such as Spain, Poland, several parts of Italy and many other Kingdoms Republics and dependencies. The Napoleonic Era changed the face of Europe forever, and old Empires and Kingdoms fell apart as a result of the mighty and "Glorious" surge of Republicanism.

What characterized the Napoleonic Era?
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A:
The campaigns of French Emperor and General Napoleon Bonaparte