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: "when did 18 year olds get the right to vote in the us?" whose answer is 1971.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did 18 year olds get the right to vote in the us
Useful Output:

Doc 1: The 26th Amendment, which lowered the voting age to 18, has roots in WWII history.
Doc 2: August 18, 2020 marks 100 years since the ratification of the 19th Amendment to the United States Constitution granting women the right to vote.
Doc 3: The Court held that it was unconstitutional for Congress to lower the voting age in state and local elections, and thus that provision was
Doc 4: But the decades-long push to lower the voting age from 21 to 18, which culminated in the 1971 ratification of the 26th Amendment, came about
Doc 5: Voting Rights Milestones in America: A Timeline. Through the decades, the right to vote in U.S. elections has seen massive change and expansion.