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: "who invented the first curling iron in 1872?" whose answer is Marcel Grateau.
Each document should contain about 30 words, and these documents should contain useful information.

Query: invention of the first curling iron 1872
Useful Output:

Doc 1: The first curling iron was invented by Marcel Grateau in 1872. Grateau was a French hairdresser who sought to create a tool that could help
Doc 2: In 1872, metal hair rollers were replaced by the quickly popular invention of a curling iron. French hairstylist, Marcel Grateau (1852–1936) was
Doc 3: TBT In 1872, Marcel Grateau invented the first curling iron!
Doc 4: Fun Fact: Hairdresser Marcel Grateau invented the first heated curling iron in 1872, using a metal rod heated over an open flame!
Doc 5: The first curling iron was invented by a Norwegian immigrant and blacksmith named Torgrim Fjeld. Your question has. been solved!