Question: What song is sung by Perry Como and London Boy Singers? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: The Odessa File Context: On 22 November 1963, the day that President John F. Kennedy is assassinated in Dallas, Peter Miller, a young freelance reporter, pulls over to the curb to listen to a radio report of the event in a district in Hamburg, West Germany. As a result, he happens to be stopped at a traffic signal as an ambulance passes by on a highway. He chases the ambulance and discovers it is en route to pick up the body of an elderly Jewish Holocaust survivor who had committed suicide, leaving behind no family. The reporter obtains the diary of the man, which contains information on his life in the Second World War Riga Ghetto, and the name of the SS officer who ran the camp, Eduard Roschmann. Determined to hunt Roschmann down, Miller dares to go undercover to join and infiltrate the ODESSA and find Roschmann, who now runs a high-tech company which plans to send radio gyroscopes and biochemical warheads to Egypt to use against Israel. ODESSA is an acronym for the German phrase "Organisation der Ehemaligen SS-Angehorigen", which translates as "Organisation of Former Members of the SS". The film's title song, "Christmas Dream", is sung by Perry Como and the London Boy Singers.
The answer to this question is:
"Christmas Dream"