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.
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Question: The Penguin ( Oswald Chesterfield Cobblepot ) is a fictional supervillain appearing in comic books published by DC Comics , commonly as an adversary of the superhero Batman .

Answer: The Penguin ( Oswald Cobblepot ) is an enemy of Batman in DC Comics .


Question: His lasting reputation rests principally on the theory of literary criticism that he developed in " Anatomy of Criticism " ( 1957 ) , one of the most important works of literary theory published in the twentieth century .

Answer: His most famous book is " The Anatomy of Criticism " ( 1957 ) .


Question: Cygnus X-1 ( abbreviated Cyg X-1 ) is a galactic X-ray source in the constellation Cygnus , and the first such source widely accepted to be a black hole .

Answer:
Cygnus X-1 was the first X-ray source accepted as a black hole .