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: "The New River, a London waterway opened in 1613, supplies drinking water from the springs of which river?" whose answer is River Lea.
Each document should contain about 30 words, and these documents should contain useful information.

Query: source of the new river london
Useful Output:

Doc 1: The source of this canal, which became known as the New River, was a series of springs near Ware in Hertfordshire. From here, it flowed over a rambling route
Doc 2: Constructed in 1613, it was an artificial waterway to bring fresh water from springs in Hertfordshire to the New River Head, a reservoir in
Doc 3: The New River was a canal opened in 1613 to supply London's growing population with fresh water, which was commercially sold by the New River Company.
Doc 4: The Chadwell Springs were the original source, with the link to the River Lee added later when more water was required to support London's
Doc 5: The New River was commissioned by the Corporation of the City of London to carry water from the Chadwell and Amwell Springs to Islington, London.