query: What is the largest city in Rhineland-Palatinate?
passage: Rhineland-Palatinate
Rhineland-Palatinate is located in western Germany covering an area of 19,846 square kilometres (7,663sqmi) and a population of 4.05 million inhabitants, the seventh-most populous German state. Mainz is the state capital and largest city, while other major cities include Ludwigshafen am Rhein, Koblenz, Trier, Kaiserslautern, and Worms.[1] Rhineland-Palatinate is surrounded by the states of North Rhine-Westphalia, Saarland, Baden-Württemberg, and Hesse. It also borders three foreign countries: France, Luxembourg and Belgium.
passage: Frankfurt Rhine-Main
The Frankfurt Rhine-Main Metropolitan Region, often simply referred to as Frankfurt Rhine-Main, Frankfurt Rhine-Main area or Rhine-Main area (German: "Frankfurt/Rhein-Main", abbreviated FRM) is the third largest metropolitan region in Germany (after Ruhr and Berlin), with a total population exceeding 5.8 million. The metropolitan region is located in the central western part of Germany, and stretches over parts of three federal states: Hesse, Rhineland-Palatinate and Bavaria, as well as the cities of Frankfurt am Main, Wiesbaden, Offenbach, Mainz, Darmstadt and Aschaffenburg.