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:
The idiom " pig in a poke " is used to describe something which is purchased without the buyer being aware of its true nature or value .
Answer:
The English colloquialisms such as " turn out to be a pig in a poke " or " buy a pig in a poke " mean that something is sold or bought without the buyer knowing its true nature or value , especially when buying without inspecting the item beforehand .