With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Hypothyroidism can cause depression in men.
text_B: Olavi Salsola -LRB- Keuruu , 26 December 1933 - Rauma , 8 October 1995 -RRB- was a Finnish male middle distance runner .. Finnish. Finland. Keuruu. Keuruu. Rauma. Rauma, Finland. middle distance runner. Middle distance running
not_related.