Complex sentence: St. Ambrose Cathedral is the cathedral parish of the Roman Catholic Diocese of Des Moines, and is located at 607 High Street in Des Moines, Iowa in the center of the city.
Split into simpler sentences: St. Ambrose Cathedral is the cathedral parish of the Roman Catholic Diocese of Des Moines, located in Des Moines, Iowa. The Cathedral is located at 607 High Street in Des Moines, near the center of the city.