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 the gold standard end in the us?" whose answer is August 15, 1971.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the us end the gold standard
Useful Output:

Doc 1: Richard Nixon's decision to delink the dollar from gold, announced without warning in August 1971, remade the global monetary system in an instant.
Doc 2: On August 15, 1971, President Richard M. Nixon announced his New Economic Policy, a program “to create a new prosperity without war.”
Doc 3: “The United States finally abandoned the gold standard in 1971, during Richard Nixon's first term as president. With that, a disastrous
Doc 4: APMEX's own asset-backed card is coming soon. Get early access here: https://www.surveylegend.com/s/5ynt Before 1971, the American economy
Doc 5: As mentioned above, Britain terminated the gold standard in 1931 and the U.S. did the same in 1933.  "Nixon Ends Convertibility of U.S. Dollars to Gold and