Question: How many miles is the racing circuit in which Jack Dunfee played one of the "Bentley Boys" before the Second World War?
Sentence (from "Brooklands"): It opened in 1907 and was the world's first purpose-built motor racing circuit as well as one of Britain's first airfields, which also became Britain's largest aircraft manufacturing centre by 1918, producing military aircraft such as the Wellington and civil airliners like the VC-10.
Relevant evidence: No