Task: Text Simplification
Input (English): Perjury operates in American law as an inherited principle of the common law of England , which defined the act as the " willful and corrupt giving , upon a lawful oath , or in any form allowed by law to be substituted for an oath , in a judicial proceeding or course of justice , of a false testimony material to the issue or matter of inquiry . "
Output (English): Perjury in American law comes from the common law of England , which defined the it as giving a false testimony under oath that has to do with the issue .