With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Machu Picchu was located in the Americas.
text_B: 1460 Haltia -LRB- 1937 WC -RRB- is a main-belt asteroid discovered on November 24 , 1937 , by Yrjo Vaisala at Turku .. Yrjo Vaisala. Yrjo Vaisala. Turku. Turku. main-belt. Asteroid belt. asteroid. asteroid
not_related.