The problem: Answer a question about this article:
Air quality in Boston is generally very good: during the ten-year period 20042013, there were only 4 days in which the air was unhealthy for the general public, according to the EPA.
How many days between 2004 and 2013 was the air unhealthy?
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The answer: 4 days

The problem: Answer a question about this article:
The word "animal" comes from the Latin animalis, meaning having breath, having soul or living being. In everyday non-scientific usage the word excludes humans that is, "animal" is often used to refer only to non-human members of the kingdom Animalia; often, only closer relatives of humans such as mammals, or mammals and other vertebrates, are meant. The biological definition of the word refers to all members of the kingdom Animalia, encompassing creatures as diverse as sponges, jellyfish, insects, and humans.
What does the Latin word animalis mean?
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The answer: having breath, having soul or living being

The problem: Answer a question about this article:
The peaceful introduction of Islam in the early medieval era of Somalia's history brought Islamic architectural influences from Arabia and Persia. This had the effect of stimulating a shift in construction from drystone and other related materials to coral stone, sundried bricks, and the widespread use of limestone in Somali architecture. Many of the new architectural designs, such as mosques, were built on the ruins of older structures. This practice would continue over and over again throughout the following centuries.
During what period was the Muslim faith introduced to Somalia?
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The answer: early medieval

The problem: Answer a question about this article:
Since the late 19th century, most treaties have followed a fairly consistent format. A treaty typically begins with a preamble describing the contracting parties and their joint objectives in executing the treaty, as well as summarizing any underlying events (such as a war). Modern preambles are sometimes structured as a single very long sentence formatted into multiple paragraphs for readability, in which each of the paragraphs begins with a verb (desiring, recognizing, having, and so on).
What is the beginning of a typical treaty called?
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The answer:
a preamble