Q:Information: - A riverboat is a watercraft designed for inland navigation on lakes, rivers, and artificial waterways. They are generally equipped and outfitted as work boats in one of the carrying trades, for freight or people transport, including luxury units constructed for entertainment enterprises, such as lake or harbour tour boats. As larger water craft, virtually all riverboats are especially designed and constructed, or alternatively, constructed with special-purpose features that optimizes them as riverine or lake service craft, for instance, dredgers, survey boats, fisheries management craft, fireboats and law enforcement patrol craft. - A civil war, also known as an intrastate war in polemology, is a war between organized groups within the same state or country, or, less commonly, between two countries created from a formerly united state. The aim of one side may be to take control of the country or a region, to achieve independence for a region or to change government policies. The term is a calque of the Latin "bellum civile" which was used to refer to the various civil wars of the Roman Republic in the 1st century BC. - US Ram Switzerland was a paddle steamer ram operated by the US Army during the American Civil War . - A paddle steamer is a steamship or riverboat powered by a steam engine that drives paddle wheels to propel the craft through the water. - Secession (derived from the Latin term "secessio") is the withdrawal of a group from a larger entity, especially a political entity (a country), but also any organization, union or military alliance. Threats of secession can also be a strategy for achieving more limited goals. - The American Civil War was a civil war in the United States fought from 1861 to 1865. The Union faced secessionists in eleven Southern states grouped together as the Confederate States of America. The Union won the war, which remains the bloodiest in U.S. history. - The Confederate States, officially the Confederate States of America (CSA or C.S.), commonly referred to as the Confederacy, was an unrecognized breakaway country of 11 secessionist slave states existing from 1861 to 1865. It was originally formed by seven slave states South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas in the Lower South region of the United States whose regional economy was mostly dependent upon agriculture, particularly cotton, and a plantation system that relied upon the labor of African-American slaves. - A steam engine is a heat engine that performs mechanical work using steam as its working fluid. - A steamship, often referred to as a steamer, is an ocean faring seaworthy vessel that is propelled by one or more steam engines that typically drive (turn) propellers or paddlewheels. The first steamships came into practical usage during the early 1800s; however, there were exceptions that came before. Steamships usually use the prefix designations of "PS" for "paddle steamer" or "SS" for "screw steamer" (using a propeller or screw). As paddle steamers became less common, "SS" is assumed by many to stand for "steam ship". Ships powered by internal combustion engines use a prefix such as "MV" for "motor vessel", so it is not correct to use "SS" for most modern vessels. Given the information, choose the subject and object entities that have the relation of 'instance of'.
A:
uss switzerland , ship