Question: Which beacon is located 2.5 miles south of Hemel Hempstead, Hertfordshire?
Sentence (from "RAF Bovingdon"): Royal Air Force Bovingdon or more simply RAF Bovingdon is a former Royal Air Force station located near the village of Bovingdon, 2.5 mi south of Hemel Hempstead, Hertfordshire and 2.5 mi southeast of Berkhamsted, Hertfordshire, England.
Relevant evidence: Yes