premise: Sullivan is a city in Hamilton Township, Sullivan County, Indiana, United States. The population was 4,249 at the 2010 census. It is part of the Terre Haute Metropolitan Statistical Area. The city is the county seat of Sullivan County. The town is served by the Southwest School Corporation, and students go to Sullivan High School.
hypothesis: The population in Sullivan county is 4,249
reason: The town is inside the county.  The county will likely be greater, but not necessarily 