Question: In what year did Murakami Namiroku's grandson, assassinate a politician?
Sentence (from "Otoya Yamaguchi"): Otoya Yamaguchi (山口 二矢 , "Yamaguchi Otoya" , February 22, 1943 – November 2, 1960) was a Japanese ultranationalist who assassinated Inejiro Asanuma, a politician and head of the Japan Socialist Party.
Relevant evidence: Yes