With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Reese Witherspoon's breakthrough role was an adaptation of an Amanda Brown novel.
text_B: ChaiChalk is a Pakistani company which operates in the literary industry .. It raised PKR 2.3 million during relief efforts for those affected by the 2015 Hindu Kush earthquake and operates mainly though it 's online network and events .. 2015 Hindu Kush earthquake. October 2015 Hindu Kush earthquake
not_related.