Question: In what year did Murakami Namiroku's grandson, assassinate a politician?
Sentence (from "Otoya Yamaguchi"): Yamaguchi was a member of a right-wing Uyoku dantai group, and assassinated Asanuma by yoroidōshi on October 12, 1960, at Tokyo's Hibiya Hall during a political debate in advance of parliamentary elections.
Relevant evidence: Yes