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 they stop making silver dollar coins?" whose answer is December 11, 2011.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did they stop making silver dollar coins
Useful Output:

Doc 1: The last minting of US silver dollar coins occurred in 1935 in part due to a surplus of the coinage on the market. The 1970s: From Eisenhower
Doc 2: Silver quarters were discontinued in 1965 under the Coinage Act of 1965. Under this law, US mints were required to stop including real silver in United States
Doc 3: Q: What year did they quit silver coin production? A: Silver coin production in the United States officially ended in 1964. Q: What is a silver
Doc 4: Silver dollars stopped in 1904; why? In American history, when the production of a series of coins ended, there usually was a changeover to a
Doc 5: Morgan Silver Dollars are by far the most actively collected series of United States coins. They were minted from 1878 to 1904 and again in 1921.