Context: The Great Plains lie west of the Mississippi River and east of the Rocky Mountains. A large portion of the country's agricultural products are grown in the Great Plains. Before their general conversion to farmland, the Great Plains were noted for their extensive grasslands, from tallgrass prairie in the eastern plains to shortgrass steppe in the western High Plains. Elevation rises gradually from less than a few hundred feet near the Mississippi River to more than a mile high in the High Plains. The generally low relief of the plains is broken in several places, most notably in the Ozark and Ouachita Mountains, which form the U.S. Interior Highlands, the only major mountainous region between the Rocky Mountains and the Appalachian Mountains.

Question: What area is located in between the Mississippi River and the Rocky Mountains?
Answer: The Great Plains

Question: In which area are a large number of the country's agricultural products grown?
Answer: the Great Plains

Question: How high does elevation rise in the Great Plains?
Answer: a mile high

Question: What is the only major mountain ranged located between the Appalachian Mountains and the Rocky Mountains?
Answer: Interior Highlands

Question: What area is located between the Mississippi River and the appellation Mountains? 
Answer: Unanswerable

Question: A small portion of the countries what is grown in the Great Plains? 
Answer: Unanswerable

Question: The elevation of what is more than a mile high near the Mississippi River?
Answer: Unanswerable

Question: What are the only mountains between the Rocky Mountains and Appellation Mountains?
Answer: Unanswerable

Question: Before being converted to grassland the Great Plains were known for what?
Answer: Unanswerable