In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

[EX Q]: Context: The city is built on the banks of the Jordanne, a tributary of the Cère Link Information: The Cère is a 120 km long river in south-western France Question: How long is the river that Jordanne flows into?
[EX A]: Answer: 120 km

[EX Q]: Context: He fought with the Confederates against the Parliamentarians in 1645–6, and led a successful assault on Roscommon Castle in 1646. Link Information:  The entire castle was enclosed by a lofty curtain wall. It was built in 1269 by Robert de Ufford, Justiciar of Ireland, on lands he had seized from the Augustinian Priory. Question: What year was the castle that FitzWilliam led the assault on built?
[EX A]: Answer: 1269

[EX Q]: Context: The northern counties of the metropolitan area overlap North Alabama known locally as the "Tennessee Valley" making it the largest metropolitan area in that region as well. Nearby counties Tuscaloosa, Etowah, and Calhoun, while not officially a part of Greater Birmingham, contribute significantly to the region's economy. Link Information: Tuscaloosa County is a county in the west central portion of the U.S. state of Alabama. As of the 2010 census, its population was 194,656 (estimated at 206,102 in 2016 by the United States Census Bureau). Question: Which of the nearby counties of the "Tennessee Valley"  has the largest population? 
[EX A]:
Answer: Tuscaloosa County