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 Missouri Rhineland is a geographical area located mostly in a valley that is how long?" whose answer is 2300 mi.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Missouri Rhineland length valley
Useful Output:

Doc 1: The German Heritage Corridor connects those communities along scenic byways, showcasing their specific German heritage and creates a corridor designed to
Doc 2: This is a wall map from a book titled, Settlement Patterns in Missouri: A Study of Population Origins by Russel L. Gerlach, cartography by Melody Morris,
Doc 3: The Missouri Rhineland is a cultural region in Missouri known for its German immigrant population. Their legacy has left quite a mark in the
Doc 4: The Missouri Rhineland (German: Missouri Rheinland) is a German American cultural region of Missouri that extends from west of St. Louis to slightly east of
Doc 5: The Missouri Rhineland is a geographical area of Missouri that extends from west of St. Louis to slightly east of Jefferson City, located mostly in the