Text: Arthur Koestler wrote the same thing in his Thirteenth Tribe , stating that if most of the world's Jews come from the Volga region, then anti-Semitism will become void of meaning.
Entailment: Arthur Koestler stated that anti-Semitism is void of meaning if most of the world's Jews come fro the Volga region.
Contradiction: Arthur Koestler's Thirteenth Tribe justifies anti-Semitism.