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 was the last time assault weapons were banned?" whose answer is September 13, 2004.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the last time assault weapons were banned in the us
Useful Output:

Doc 1: The last assault weapons ban expired in 2004, but a new study finds that had that ban remained in place, as many as 30 mass shootings could
Doc 2: Assault weapons are semi-automatic guns designed for military use and quick, efficient killing. They are uniquely lethal because of their rapid rate of fire
Doc 3: That law, among other things, included an “assault weapons” ban, which prohibited the sale of certain semiautomatic firearms and large-capacity
Doc 4: The history of the federal assault-weapons ban, passed in 1994 after an epic political battle on Capitol Hill, offers a cautionary tale.
Doc 5: Is It Time To Bring Back The Assault Weapons Ban? Mass Shootings  gun massacres” if the 1994 federal assault weapons ban was reinstated.