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: "where does the green river start in kentucky?" whose answer is Kings Mountain.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Green River Kentucky start point
Useful Output:

Doc 1: Location: Green River Ferry Road, Mammoth Cave, Kentucky, 42259. Significance: The Green River Ferry is the only active river ferry in
Doc 2: This 25-mile river flowing through Mammoth Cave National Park is great for canoeing, fishing or just plain swimming.
Doc 3: Green River Lake is situated in Adair and Taylor counties, lying amidst rolling terrain, steep bluffs and flowing streams in the section of Kentucky known as
Doc 4: Its headwaters begin in Lincoln County with the convergence of three streams, and it spills into the Ohio River in Henderson, Kentucky. In our
Doc 5: Green River Lake State Park is approx. 85 miles from Louisville & Lexington. From Campbellsville, Hwy 55 South, 4 mi. turn on 1061, 2 miles park entrance.