Question: In what country is the county of Berkshire and the Thames Valley located?
Sentence (from "Slough"): Slough ( ) is a large town in Berkshire, England, on the western fringes of the Greater London Urban Area, 20 mi west of central London, 3 mi north of Windsor, 6 mi east of Maidenhead, 12 mi south-east of High Wycombe and 20 mi north-east of Reading.
Relevant evidence: No