Here is a question about this article: Computers have been used to coordinate information between multiple locations since the 1950s. The U.S. military's SAGE system was the first large-scale example of such a system, which led to a number of special-purpose commercial systems such as Sabre.
What is the answer to this question: What system of the U.S. military's was the first large-scale system to coordinate information between several locations?
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So... SAGE system


Here is a question about this article: Neutering refers to the sterilization of animals, usually by removal of the male's testicles or the female's ovaries and uterus, in order to eliminate the ability to procreate and reduce sex drive. Because of the overpopulation of dogs in some countries, many animal control agencies, such as the American Society for the Prevention of Cruelty to Animals (ASPCA), advise that dogs not intended for further breeding should be neutered, so that they do not have undesired puppies that may have to later be euthanized.
What is the answer to this question: In neutering, what is removed in a male dog?
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So... testicles


Here is a question about this article: However, an analysis by the Regional Data Cooperative for Greater New Haven, Inc., has shown that due to issues of comparative denominators and other factors, such municipality-based rankings can be considered inaccurate. For example, two cities of identical population can cover widely differing land areas, making such analyses irrelevant. The research organization called for comparisons based on neighborhoods, blocks, or standard methodologies (similar to those used by Brookings, DiversityData, and other established institutions), not based on municipalities.
What is the answer to this question: According to the institution what leads to inaccurate analysis of the city?  
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So...
cities of identical population