With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Francisco has a bay.
text_B: The Steinwald is a mountain range up to in southern Germany and , at the same time , a nature park -LRB- Steinwald Nature Park -RRB- founded in 1970 with an area of 246 km2 in the province of Upper Palatinate , in North Bavaria .. mountain range. mountain range. Germany. Germany. nature park. nature park. Upper Palatinate. Upper Palatinate. Bavaria. Bavaria
not_related.