Question: What is the police force who uses the Mercedes-Benz Sprinter police van and is also the largest disciplined service under the Security Bureau of Hong Kong formed on 1 May 1844?
Sentence (from "Hong Kong Police Force"): In 1969, Queen Elizabeth II granted the 'Royal' prefix and the HKPF became the "Royal Hong Kong Police Force", only to be removed in 1997 upon the transfer of sovereignty of Hong Kong to China.
Relevant evidence: No