Question:  Marion is approximately 50 mi north of a city that is the third-most populous what in the U.S.?

Related documents: [0]  [DOC] Marion is a city in and the county seat of Marion County, Ohio, United States. The municipality is located in north-central Ohio, approximately 50 mi north of Columbus. [END] 
[1]  [DOC] Columbus ( ) is the capital and largest city of the U.S. state of Ohio. It is the 14th-largest city in the United States, with a population of 860,090 as of 2016 estimates. This makes Columbus the third-most populous state capital in the United States, and the second-largest city in the Midwestern United States, after Chicago. It is the core city of the Columbus, Ohio, Metropolitan Statistical Area, which encompasses ten counties. With a population of 2,021,632, it is Ohio's third-largest metropolitan area. [END]  
Answer: state capital
state capital