Question: Was the subject of Parsifal taken from British folklore?, Answer:Yes, Description of Parsifal: opera in three acts by Richard Wagner, Fact1: Parsifal was loosely based on a poem about Percival, Fact2: Percival was a Knight of the Round Table, Fact3: King Arthur and the Knights of the Round Table were products of British folklore
Step1: What was the opera 'Parsifal' based on?, Step2: Who is the main character in #1?, Step3: Which group is #2 part of?, Step4: Did #3 originate from British folklore?, Wikipedia page for step 1: Parsifal, Wikipedia page for step 2: Parzival, Wikipedia page for step 3: Percival, Wikipedia page for step 4: King Arthur, not_definitive_answer: False, incorrect_answer: False