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 laid foundation of modern minting of coins?" whose answer is Roman Empire.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of modern coin minting
Useful Output:

Doc 1: It is estimated that the earliest mint for coining gold and silver was established during the 7th century in Lydia, an area near the
Doc 2: In 1792, the Philadelphia Mint made coins using a well-established process. The screw press requires a furnace to heat the metals to the proper smelting
Doc 3: The concept of using coins as a medium of exchange dates back to around 600 BC in the ancient kingdom of Lydia, located in modern-day Turkey.
Doc 4: Stamped coins originated in communities around the Aegean Sea. Made by heating metal and hammering in a motif, this form of manufacture and the
Doc 5: From the original ancient Lydian and Ionian Greek processes to the hyper-efficient computerized methods used today, we'll explore an overview of the history of