instruction:
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.
question:
It also introduced the concept of the natural rate of unemployment and argued that labor market equilibrium is independent of the rate of inflation tand and so is no long run tradeoff between unemployment and inflation .
answer:
It was the first idea of the natural rate of unemployment and said that inflation rates did not affect labour market .

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:
A webcast is a media presentation distributed over the Internet using streaming media technology to distribute a single content source to many simultaneous listeners / viewers .
answer:
A webcast is a type of media file used on the Internet .