Question: What year was the album released by Gato Barbieri which features live performances recorded at the second largest jazz festival in the world?
Sentence (from "El Pampero"): El Pampero is a live album by Argentinian jazz composer and saxophonist Gato Barbieri featuring performances recorded at the Montreux Jazz Festival in 1971 and first released on the Flying Dutchman label.
Relevant evidence: Yes