Question: Which British Prime Minister was the target of an alleged blackmail plot by the KGB and the Czechoslovakian secret service (StB)?
Sentence (from "Carmine Pecorelli"): Carmine Pecorelli (September 14, 1928 – March 20, 1979), known as Mino, was an Italian journalist, shot dead in Rome a year after former prime minister Aldo Moro's 1978 kidnapping and subsequent killing.
Relevant evidence: No