In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

[Q]: Since the list began , every serving President of the United States has been a Man or Person of the Year at least once with the exceptions of Calvin Coolidge ( in office at time of the first issue ) , Herbert Hoover ( the subsequent U.S. President ) , and Gerald Ford .
[A]: Since the list began , every serving President of the United States has been a Person of the Year at least once , except for Calvin Coolidge , Herbert Hoover , and Gerald Ford .

[Q]: The " population growth rate " is the rate at which the number of individuals in a population increases in a given time period , expressed as a fraction of the initial population .
[A]: Population growth is the rate at which a population grows or expands .

[Q]: The species most commonly referred to as " pigeon " is the species known by scientists as the rock dove , one subspecies of which , the domestic pigeon , is common in many cities as the feral pigeon .
[A]:
The feral domestic pigeon is often called the " rock dove " : it is common in many cities .