Question: Though known since antiquity the commercial growing of cotton in Egypt only started in 1820's, following a Frenchman, by the name of M. Jumel, propositioning the then ruler, Mohamed Ali Pasha, that he could earn a substantial income by growing an extra-long staple Maho (Barbadence) cotton, in Lower Egypt, for the French market. Mohamed Ali Pasha accepted the proposition and granted himself the monopoly on the sale and export of cotton in Egypt; and later dictated cotton should be grown in preference to other crops. By the time of the American Civil war annual exports had reached $16 million (120,000 bales), which rose to $56 million by 1864, primarily due to the loss of the Confederate supply on the world market. Exports continued to grow even after the reintroduction of US cotton, produced now by a paid workforce, and Egyptian exports reached 1.2 million bales a year by 1903.
Is there an answer to this question: Who was ruler of Egypt in 1903?

Answer: unanswerable


Question: The return of Soviet immigrants to their countries of origin has brought the proportion of Estonians in Estonia back above 70%. And again as in Latvia, today many of the remnant non-Estonians in Estonia have adopted the Estonian language; about 40% at the 2000 census.
Is there an answer to this question: What percentage of Soviets spoke Estonian? 

Answer: unanswerable


Question: The uneasy alliance of Carranza, Obregón, Villa, and Zapata eventually led the rebels to victory. The fight against Huerta formally ended on August 15, 1914, when Álvaro Obregón signed a number of treaties in Teoloyucan in which the last of Huerta's forces surrendered to him and recognized the constitutional government. On August 20, 1914, Carranza made a triumphal entry into Mexico City. Carranza (supported by Obregón) was now the strongest candidate to fill the power vacuum and set himself up as head of the new government. This government successfully printed money, passed laws, etc.
Is there an answer to this question: Who made a triumphant entry into Mexico City on August 20, 1914?

Answer: Carranza


Question: The Paris Region is France's leading region for economic activity, with a 2012 GDP of €624 billion (US$687 billion). In 2011, its GDP ranked second among the regions of Europe and its per-capita GDP was the 4th highest in Europe. While the Paris region's population accounted for 18.8 percent of metropolitan France in 2011, the Paris region's GDP accounted for 30 percent of metropolitan France's GDP. In 2015 it hosts the world headquarters of 29 of the 31 Fortune Global 500 companies located in France.
Is there an answer to this question: What percentage of Frances GDP is made up from the Paris Region's GDP?

Answer:
30