Original sentence: He  claimed to be a Merovingian pretender to the throne of France during the early 1960s, his position being influenced by an article that he had read by Louis Saurel in the French magazine Les Cahiers de l'Histoire Number 1 (1960).Pierre Athanase Marie Plantard  (March 18,1920 - February 3,2000) was the founder of the Priory of Sion
Edited sentence: He became an impostor who claimed to be a Merovingian pretender to the throne of France during the early 1960s, his position being influenced by an article that he had read by Louis Saurel in the French magazine Les Cahiers de l'Histoire Number 1 (1960).Pierre Athanase Marie Plantard  (March 18,1920 - February 3,2000) was the mastermind behind the Priory of Sion hoax