Premise: The Columbia River Subdivision or Columbia River Sub is a railway line running about 167 mi from Wenatchee to Spokane, Washington. It is operated by BNSF Railway as part of their Northern Transcon. The original line (built in 1893) was built as part of James J. Hill's Great Northern Railway transcontinental railway line.
Hypothesis:  The Columbia River Subdivision is a railway line running about 167 mi in Washington. It is operated by BNSF Railway. The original line was built as transcontinental railway line.