Here is a question about this article: In addition to numerous articles on mathematics, Whitehead wrote three major books on the subject: A Treatise on Universal Algebra (1898), Principia Mathematica (co-written with Bertrand Russell and published in three volumes between 1910 and 1913), and An Introduction to Mathematics (1911). The former two books were aimed exclusively at professional mathematicians, while the latter book was intended for a larger audience, covering the history of mathematics and its philosophical foundations. Principia Mathematica in particular is regarded as one of the most important works in mathematical logic of the 20th century.
What is the answer to this question: What did Whitehead publish numerous articles about?
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So... mathematics

Here is a question about this article: The assertions of Chinese philosophy began to integrate concepts of Western philosophy, as steps toward modernization. By the time of the Xinhai Revolution in 1911, there were many calls, such as the May Fourth Movement, to completely abolish the old imperial institutions and practices of China. There were attempts to incorporate democracy, republicanism, and industrialism into Chinese philosophy, notably by Sun Yat-Sen (Sun yi xian, in one Mandarin form of the name) at the beginning of the 20th century. Mao Zedong (Mao ze dong) added Marxist-Leninist thought. When the Communist Party of China took over power, previous schools of thought, excepting notably Legalism, were denounced as backward, and later even purged during the Cultural Revolution.
What is the answer to this question: When did the Xinhai Revolution begin?
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So... 1911

Here is a question about this article: Richmond's original street grid, laid out in 1737, included the area between what are now Broad, 17th, and 25th Streets and the James River. Modern Downtown Richmond is located slightly farther west, on the slopes of Shockoe Hill. Nearby neighborhoods include Shockoe Bottom, the historically significant and low-lying area between Shockoe Hill and Church Hill, and Monroe Ward, which contains the Jefferson Hotel. Richmond's East End includes neighborhoods like rapidly gentrifying Church Hill, home to St. John's Church, as well as poorer areas like Fulton, Union Hill, and Fairmont, and public housing projects like Mosby Court, Whitcomb Court, Fairfield Court, and Creighton Court closer to Interstate 64.
What is the answer to this question: What is Fairfield Court?
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So...
public housing projects