The problem: Answer a question about this article:
An alloy of aluminium and gallium in pellet form added to water can be used to generate hydrogen. The process also produces alumina, but the expensive gallium, which prevents the formation of an oxide skin on the pellets, can be re-used. This has important potential implications for a hydrogen economy, as hydrogen can be produced on-site and does not need to be transported.
When you combine an alloy of alluminum and gallium to water, what do you get?
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The answer: hydrogen

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The aftermath of World War II saw an explosion in the discovery of new classes of antibacterial drugs including the cephalosporins (developed by Eli Lilly based on the seminal work of Giuseppe Brotzu and Edward Abraham), streptomycin (discovered during a Merck-funded research program in Selman Waksman's laboratory), the tetracyclines (discovered at Lederle Laboratories, now a part of Pfizer), erythromycin (discovered at Eli Lilly and Co.) and their extension to an increasingly wide range of bacterial pathogens. Streptomycin, discovered during a Merck-funded research program in Selman Waksman's laboratory at Rutgers in 1943, became the first effective treatment for tuberculosis. At the time of its discovery, sanitoriums for the isolation of tuberculosis-infected people were an ubiquitous feature of cities in developed countries, with 50% dying within 5 years of admission.
What percentage of patients infected with tuberculosis died within 5 years?
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The answer: 50%

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Intermittent warfare lasting from July 23, 1670 until July 1695, plus the typhoons of 1671 and 1693, and in particular the smallpox epidemic of 1688, reduced the Chamorro population from 50,000 to 10,000 to less than 5,000.:86 Precipitated by the death of Quipuha, and the murder of Father San Vitores and Pedro Calungsod by local rebel chief Matapang, tensions led to a number of conflicts. Captain Juan de Santiago started a campaign to pacify the island, which was continued by the successive commanders of the Spanish forces.:6874
When did the Smallpox epidemic take place?
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The answer: 1688

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In Arabic-speaking cultures, two words are commonly used for Christians: Nasrani (), plural Nasara () is generally understood to be derived from Nazareth through the Syriac (Aramaic); Masihi () means followers of the Messiah. The term Nasara rose to prominence in July 2014, after the Fall of Mosul to the terrorist organization Islamic State of Iraq and the Levant. The nun or the first letter of Nasarawas spray-painted on the property of Christians ejected from the city.
What was spray pained on the properties of Christians who left the area?
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The answer:
the first letter of Nasara