In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Let me give you an example: The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
The answer to this example can be: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Here is why: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

OK. solve this:
Many people call all sparkling wines " champagne " but according to trade laws , only sparkling wine from the Champagne region can be called champagne .
Answer:
Many people use the term " Champagne " as a generic term for sparkling wine but in some countries , it is illegal to label any product " Champagne " unless it both comes from the Champagne region and is produced under the rules of the appellation .