The problem: Answer a question about this article:
H2 is a product of some types of anaerobic metabolism and is produced by several microorganisms, usually via reactions catalyzed by iron- or nickel-containing enzymes called hydrogenases. These enzymes catalyze the reversible redox reaction between H2 and its component two protons and two electrons. Creation of hydrogen gas occurs in the transfer of reducing equivalents produced during pyruvate fermentation to water. The natural cycle of hydrogen production and consumption by organisms is called the hydrogen cycle.
What enzymes are used to produce H2?
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The answer: hydrogenases

Problem: Please answer a question about the following article about Empiricism:
This idea was later developed in ancient philosophy by the Stoic school. Stoic epistemology generally emphasized that the mind starts blank, but acquires knowledge as the outside world is impressed upon it. The doxographer Aetius summarizes this view as "When a man is born, the Stoics say, he has the commanding part of his soul like a sheet of paper ready for writing upon." Later stoics, such as Sextus of Chaeronea, would continue this idea of empiricism in later Stoic writings as well. As Sextus contends "For every thought comes from sense-perception or not without sense-perception and either from direct experience or not without direct experience" (Against the Professors, 8.56-8).
Who wrote 'Against the Professors'?
A: Sextus

Question: Read this and answer the question

Calcutta (now Kolkata) was the capital of India during the British Raj until December 1911. However, Delhi had served as the political and financial centre of several empires of ancient India and the Delhi Sultanate, most notably of the Mughal Empire from 1649 to 1857. During the early 1900s, a proposal was made to the British administration to shift the capital of the British Indian Empire (as it was officially called) from Calcutta to Delhi. Unlike Calcutta, which was located on the eastern coast of India, Delhi was at the centre of northern India and the Government of British India felt that it would be logistically easier to administer India from the latter rather than the former.

In what part of India is Delhi located?
Answer: the centre of northern India

Problem: Bell's coffin was constructed of Beinn Bhreagh pine by his laboratory staff, lined with the same red silk fabric used in his tetrahedral kite experiments. To help celebrate his life, his wife asked guests not to wear black (the traditional funeral color) while attending his service, during which soloist Jean MacDonald sang a verse of Robert Louis Stevenson's "Requiem":
What color silk was used in Bell's coffin?
The answer is the following: red

On the whole, Eisenhower's support of the nation's fledgling space program was officially modest until the Soviet launch of Sputnik in 1957, gaining the Cold War enemy enormous prestige around the world. He then launched a national campaign that funded not just space exploration but a major strengthening of science and higher education. His Open Skies Policy attempted to legitimize illegal Lockheed U-2 flyovers and Project Genetrix while paving the way for spy satellite technology to orbit over sovereign territory, created NASA as a civilian space agency, signed a landmark science education law, and fostered improved relations with American scientists.
What was the legal status of the U-2 flyovers?
illegal

Here is a question about this article: Because of its simple atomic structure, consisting only of a proton and an electron, the hydrogen atom, together with the spectrum of light produced from it or absorbed by it, has been central to the development of the theory of atomic structure. Furthermore, the corresponding simplicity of the hydrogen molecule and the corresponding cation H+
2 allowed fuller understanding of the nature of the chemical bond, which followed shortly after the quantum mechanical treatment of the hydrogen atom had been developed in the mid-1920s.
What is the answer to this question: When was the quantum mechanical treatment of the hydrogen atom developed?
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So...
1920s