Question: What saxophonist did bandeoneon player and "nuevo tango" pioneer Astor Piazzolla collaborate with on his album Summit?
Sentence (from "Gerardo Gandini"): Gerardo Gandini (Buenos Aires, Argentina, October 16, 1936 - Buenos Aires, March 22, 2013) was a pianist, composer, and music director, who became one of the most relevant figures of contemporary Argentine music of the second half of the 20th century.
Relevant evidence: No