Question: What did the organizer of a pop concert held at Knebworth House found in 1969?
Sentence (from "Freddy Bannister"): Freddy Bannister (sometimes written as Freddie Bannister) was a leading UK concert promoter during the 1960s and 1970s, and was the founder of the Bath Festival of Blues 1969, the Bath Festival of Blues and Progressive Music 1970 and the Knebworth festivals.
Relevant evidence: Yes