You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "what is the name of the dolls that fit inside each other?" whose answer is A matryoshka doll.
Each document should contain about 30 words, and these documents should contain useful information.

Query: nesting dolls
Useful Output:

Doc 1: The origin of the Russian nesting doll, also known as Matryoshka, is a matter of legends. Allegedly invented by a professional artist, the dolls
Doc 2: The shape was inspired by a mother's portly figure depicting her fertility and her significance as the center of the traditional Russian family.
Doc 3: While the modern day nesting doll is most popularly associated with Russia (Matryoshka dolls), the first nesting dolls actually came from China.
Doc 4: Tori, Britt, and Erica are sorority sisters who spend a week together at a river house. When near-catastrophe strikes, the three are forced against one another,
Doc 5: Shop our vast collection of Hand-Painted Matryoshka Old-World Nested Dolls, which consist of a wooden figure that separates at the middle, top from bottom, to