Premise: The Aurora Subdivision or Aurora Sub is a railway line in Wisconsin and Illinois operated by BNSF Railway. It is part of BNSF's Chicago, Illinois, to Seattle, Washington, Northern Transcon. This segment runs about 262 mi from the St. Croix Subdivision in La Crosse, Wisconsin, to the Chicago Subdivision in Aurora, Illinois.
Hypothesis: Aurora Sub is a railway line that runs less than 300 miles from the St. Croix Subdivision