Complex sentence: The Bureau of Economic Analysis combines the city of Harrisonburg with Rockingham County for statistical purposes into the Harrisonburg, Virginia Metropolitan Statistical Area, which has a 2011 estimated population of 126,562.
Split into simpler sentences: The Bureau of Economic Analysis combines the city of Harrisonburg with Rockingham County for statistical purposes. Harrisonburg is the core city of the Harrisonburg, Virginia Metropolitan Statistical Area, which has a 2011 estimated population of 126,562.