Question: In what year did Murakami Namiroku's grandson, assassinate a politician?
Sentence (from "Underground (Murakami book)"): Underground: The Tokyo Gas Attack and the Japanese Psyche (アンダーグラウンド , Andāguraundo , 1997–1998) is a book by Japanese novelist Haruki Murakami about the 1995 Aum Shinrikyo sarin gas attack on the Tokyo subway.
Relevant evidence: No