Problem: Spanish language in the United States:

The Spanish language has been present in what is now the United States since the 16th and 17th centuries, with the arrival of Spanish colonization in North America that would later become the states of Florida, Texas, Colorado, New Mexico, Arizona, Nevada, Utah, and California. The Spanish explorers explored areas of 42 future U.S. states leaving behind a varying range of Hispanic legacy in the North American continent. Additionally, western regions of the Louisiana Territory were under Spanish rule between 1763 to 1800, after the French and Indian War, further extending the Spanish influence throughout modern-day United States of America.

Which years was the Louisiana Territory under Spanish rule?
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A: unanswerable

Problem: St. John's is served by the Eastern School District, the largest school district in Newfoundland and Labrador by student population. There are currently 36 primary, elementary and secondary schools in the city of St. John's, including three private schools. St. John's also includes one school that is part of the province-wide Conseil Scolaire Francophone (CSF), the Francophone public school district. It also contains two private schools, St. Bonaventure's College and Lakecrest Independent. Atlantic Canada's largest university, Memorial University of Newfoundland (MUN), is located in St. John's. MUN provides comprehensive education and grants degrees in several fields and its historical strengths in engineering, business, geology, and medicine, make MUN one of the top comprehensive universities in Canada. The Fisheries and Marine Institute of Memorial University of Newfoundland (MI) or simply Marine Institute, is a post-secondary ocean and marine polytechnic located in St. John's and is affiliated with Memorial University of Newfoundland. MUN also offers the lowest tuition in Canada ($2,644, per Academic Year)
What is the largest school district in Canada?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
A widely publicised example of institutionalised sexual slavery are "comfort women", a euphemism for the 200,000 women, mostly from Korea and China, who served in the Japanese army's camps during World War II. Some 35 Dutch comfort women brought a successful case before the Batavia Military Tribunal in 1948. In 1993, Chief Cabinet Secretary Yohei Kono said that women were coerced into brothels run by Japan's wartime military. Other Japanese leaders have apologized, including former Prime Minister Junichiro Koizumi in 2001. In 2007, then-Prime Minister Shinzo Abe claimed: "The fact is, there is no evidence to prove there was coercion."
In 2007 which Japenese Prime Minister said there was no proof of coercion of women to be sexual slaves?
A: Shinzo Abe

Context and question: In the early 20th century, many Europeans (particularly Spaniards and Italians but also thousands from Central Europe) immigrated to the city. In 1908, 30% of the city's population of 300,000 was foreign-born. In that decade the city expanded quickly: new neighbourhoods were created and many separate settlements were annexed to the city, among which were the Villa del Cerro, Pocitos, the Prado and Villa Colon. The Rodo Park and the Estadio Gran Parque Central were also established, which served as poles of urban development.
The Rodo Park and the Estadio Gran Parque Central serves as poles of what?
Answer: urban development

Question: The study of plants is vital because they underpin almost all animal life on Earth by generating a large proportion of the oxygen and food that provide humans and other organisms with aerobic respiration with the chemical energy they need to exist. Plants, algae and cyanobacteria are the major groups of organisms that carry out photosynthesis, a process that uses the energy of sunlight to convert water and carbon dioxide into sugars that can be used both as a source of chemical energy and of organic molecules that are used in the structural components of cells. As a by-product of photosynthesis, plants release oxygen into the atmosphere, a gas that is required by nearly all living things to carry out cellular respiration. In addition, they are influential in the global carbon and water cycles and plant roots bind and stabilise soils, preventing soil erosion. Plants are crucial to the future of human society as they provide food, oxygen, medicine, and products for people, as well as creating and preserving soil.
Is there an answer to this question: What vital element is a byproduct of photosynthesis?

Answer: oxygen

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The luxurious and ornate representative texts of Serbo-Croatian Church Slavonic belong to the later era, when they coexisted with the Serbo-Croatian vernacular literature. The most notable are the "Missal of Duke Novak" from the Lika region in northwestern Croatia (1368), "Evangel from Reims" (1395, named after the town of its final destination), Hrvoje's Missal from Bosnia and Split in Dalmatia (1404), and the first printed book in Serbo-Croatian, the Glagolitic Missale Romanum Glagolitice (1483).
What town was the Missal of Duke Novak named after?
A:
unanswerable