Problem: Greeks:

This age saw the Greeks move towards larger cities and a reduction in the importance of the city-state. These larger cities were parts of the still larger Kingdoms of the Diadochi. Greeks, however, remained aware of their past, chiefly through the study of the works of Homer and the classical authors. An important factor in maintaining Greek identity was contact with barbarian (non-Greek) peoples, which was deepened in the new cosmopolitan environment of the multi-ethnic Hellenistic kingdoms. This led to a strong desire among Greeks to organize the transmission of the Hellenic paideia to the next generation. Greek science, technology and mathematics are generally considered to have reached their peak during the Hellenistic period.

How did the cites remind themselves of their beginnings ?
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A: Greeks, however, remained aware of their past, chiefly through the study of the works of Homer and the classical authors.

Problem: Its knowledge and uses spread from China through the Middle East to medieval Europe in the 13th century, where the first water powered paper mills were built. Because of paper's introduction to the West through the city of Baghdad, it was first called bagdatikos. In the 19th century, industrial manufacture greatly lowered its cost, enabling mass exchange of information and contributing to significant cultural shifts. In 1844, the Canadian inventor Charles Fenerty and the German F. G. Keller independently developed processes for pulping wood fibres.
In which century were the first oil powered paper mills built?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
After years of demanding greater political autonomy, residents were given the right to directly elect a Head of Government and the representatives of the unicameral Legislative Assembly by popular vote in 1997. Ever since, the left-wing Party of the Democratic Revolution (PRD) has controlled both of them. In recent years, the local government has passed a wave of liberal policies, such as abortion on request, a limited form of euthanasia, no-fault divorce, and same-sex marriage. On January 29, 2016, it ceased to be called the Federal District (Spanish: Distrito Federal or D.F.) and is now in transition to become the country's 32nd federal entity, giving it a level of autonomy comparable to that of a state. Because of a clause in the Mexican Constitution, however, as the seat of the powers of the Union, it can never become a state, lest the capital of the country be relocated elsewhere.
What was Mexico City's old affiliation with the nation of Mexico?
A: Federal District

Context and question: Pope Saint John XXIII (Latin: Ioannes XXIII; Italian: Giovanni XXIII) born Angelo Giuseppe Roncalli,[a] Italian pronunciation: [andelo duzppe rokalli]; 25 November 1881 3 June 1963) reigned as Pope from 28 October 1958 to his death in 1963 and was canonized on 27 April 2014. Angelo Giuseppe Roncalli was the fourth of fourteen children born to a family of sharecroppers who lived in a village in Lombardy. He was ordained to the priesthood on 10 August 1904 and served in a number of posts, including papal nuncio in France and a delegate to Bulgaria, Greece and Turkey. In a consistory on 12 January 1953 Pope Pius XII made Roncalli a cardinal as the Cardinal-Priest of Santa Prisca in addition to naming him as the Patriarch of Venice.
When was Pope Pius XII born?
Answer: unanswerable

Question: In comparison to the principal alternative, the diesel engine, electric railways offer substantially better energy efficiency, lower emissions and lower operating costs. Electric locomotives are usually quieter, more powerful, and more responsive and reliable than diesels. They have no local emissions, an important advantage in tunnels and urban areas. Some electric traction systems provide regenerative braking that turns the train's kinetic energy back into electricity and returns it to the supply system to be used by other trains or the general utility grid. While diesel locomotives burn petroleum, electricity is generated from diverse sources including many that do not produce carbon dioxide such as nuclear power and renewable forms including hydroelectric, geothermal, wind and solar.
Is there an answer to this question: What type of fuel do diesel locomotives use?

Answer: petroleum

Problem: Hokkien:

There are many Hokkien speakers among overseas Chinese in Southeast Asia as well as in the United States. Many ethnic Han Chinese emigrants to the region were Hoklo from southern Fujian, and brought the language to what is now Burma (Myanmar), Indonesia (the former Dutch East Indies) and present day Malaysia and Singapore (formerly Malaya and the British Straits Settlements). Many of the Hokkien dialects of this region are highly similar to Taiwanese and Amoy. Hokkien is reportedly the native language of up to 98.5% of the Chinese Filipino in the Philippines, among which is known locally as Lan-nang or Lan-lang-oe ("Our people's language"). Hokkien speakers form the largest group of Chinese in Singapore, Malaysia and Indonesia.[citation needed]

What group brought the Amoy language to Burma, Malaysia and Singapore?
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A:
unanswerable