Here is a question about this article: Late in the 19th century, Paris hosted two major international expositions: the 1889 Universal Exposition, was held to mark the centennial of the French Revolution and featured the new Eiffel Tower; and the 1900 Universal Exposition, which gave Paris the Pont Alexandre III, the Grand Palais, the Petit Palais and the first Paris Metro line. Paris became the laboratory of Naturalism (Emile Zola) and Symbolism (Charles Baudelaire and Paul Verlaine), and of Impressionism in art (Courbet, Manet, Monet, Renoir.)
What is the answer to this question: What was the purpose of the 1889 Universal Exposition?
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So... to mark the centennial of the French Revolution

The problem: Answer a question about this article:
As early as the late 18th century, black Baptists began to organize separate churches, associations and mission agencies, especially in the northern states. Not only did blacks set up some independent congregations in the South before the American Civil War, freedmen quickly separated from white congregations and associations after the war. They wanted to be free of white supervision. In 1866 the Consolidated American Baptist Convention, formed from black Baptists of the South and West, helped southern associations set up black state conventions, which they did in Alabama, Arkansas, Virginia, North Carolina, and Kentucky. In 1880 black state conventions united in the national Foreign Mission Convention, to support black Baptist missionary work. Two other national black conventions were formed, and in 1895 they united as the National Baptist Convention. This organization later went through its own changes, spinning off other conventions. It is the largest black religious organization and the second largest Baptist organization in the world. Baptists are numerically most dominant in the Southeast. In 2007, the Pew Research Center's Religious Landscape Survey found that 45% of all African-Americans identify with Baptist denominations, with the vast majority of those being within the historically black tradition.
Who separated from white congregations and associations after the war?
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The answer: freedmen

Problem: Please answer a question about the following article about Nutrition:
Plants uptake essential elements from the soil through their roots and from the air (consisting of mainly nitrogen and oxygen) through their leaves. Green plants obtain their carbohydrate supply from the carbon dioxide in the air by the process of photosynthesis. Carbon and oxygen are absorbed from the air, while other nutrients are absorbed from the soil. Nutrient uptake in the soil is achieved by cation exchange, wherein root hairs pump hydrogen ions (H+) into the soil through proton pumps. These hydrogen ions displace cations attached to negatively charged soil particles so that the cations are available for uptake by the root. In the leaves, stomata open to take in carbon dioxide and expel oxygen. The carbon dioxide molecules are used as the carbon source in photosynthesis.
Having leaves allows plants to absorb nutrients through which medium?
A: air

Question: Read this and answer the question

Child labour played an important role in the Industrial Revolution from its outset, often brought about by economic hardship. The children of the poor were expected to contribute to their family income. In 19th-century Great Britain, one-third of poor families were without a breadwinner, as a result of death or abandonment, obliging many children to work from a young age. In England and Scotland in 1788, two-thirds of the workers in 143 water-powered cotton mills were described as children. A high number of children also worked as prostitutes. The author Charles Dickens worked at the age of 12 in a blacking factory, with his family in debtor's prison.

How many families were without a bread winner?
Answer: one-third

Problem: Mozart's Requiem was sung at the funeral; the soloists were the soprano Jeanne-Anais Castellan, the mezzo-soprano Pauline Viardot, the tenor Alexis Dupont, and the bass Luigi Lablache; Chopin's Preludes No. 4 in E minor and No. 6 in B minor were also played. The organist at the funeral was Louis Lefebure-Wely. The funeral procession to Pere Lachaise Cemetery, which included Chopin's sister Ludwika, was led by the aged Prince Adam Czartoryski. The pallbearers included Delacroix, Franchomme, and Camille Pleyel. At the graveside, the Funeral March from Chopin's Piano Sonata No. 2 was played, in Reber's instrumentation.
Which cemetery was Chopin buried in?
The answer is the following: Pere Lachaise Cemetery

Input: Article: Throughout most of his career, Athanasius had many detractors. Classical scholar Timothy Barnes relates contemporary allegations against Athanasius: from defiling an altar, to selling Church grain that had been meant to feed the poor for his own personal gain, and even violence and murder to suppress dissent. Athanasius used "Arian" to describe both followers of Arius, and as a derogatory polemical term for Christians who disagreed with his formulation of the Trinity. Athanasius called many of his opponents "Arian", except for Miletus.

Now answer this question: What did the term Arian mean to him?

Output:
Christians who disagreed with his formulation