Question: David Alfaro Siqueiros was a Mexican muralist who designed the Polyforum Cultural Siqueiros and was a member of what political party?
Sentence (from "Polyforum Cultural Siqueiros"): It was designed and decorated by David Alfaro Siqueiros in the 1960s and hosts the largest mural work in the world called “La Marcha de la Humanidad.”
Relevant evidence: Yes