Question:  Royal Air Force Valley provides fast-jet training using an advanced trainer aircraft first flown in what year?
Sentence (from "North American T-6 Texan"): The United States Army Air Corps (USAAC) and USAAF designated it as the AT-6, the United States Navy the SNJ, and British Commonwealth air forces the Harvard, the name by which it is best known outside of the US.
Relevant evidence: No