With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Harry Potter is a series of seven books.
text_B: Lake Pape -LRB- Papes ezers -RRB- is a lake in Latvia about 15 km south of Liepaja .. Latvia. Latvia. Liepaja. Liepaja. It is surrounded by the Pape Nature Reserve .. Pape Nature Reserve. Pape Nature Reserve. Category  : Lakes of Latvia. Latvia. Latvia
not_related.