With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: On the US Billboard 200 chart, Dangerously in Love debuted at number one.
text_B: Namdapha National Park is the largest protected area in the Eastern Himalaya biodiversity hotspot and is located in Arunachal Pradesh in Northeast India .. Arunachal Pradesh. Arunachal Pradesh. Eastern Himalaya. Eastern Himalaya. biodiversity hotspot. biodiversity hotspot. Northeast India. Northeast India. It is also the third largest national park in India in terms of area .. It is located in the Eastern Himalayan sub-region and is recognized as one of the richest areas in biodiversity in India .. Eastern Himalayan sub-region. Eastern Himalaya. The park harbours the northernmost lowland evergreen rainforests in the world at 27 ° N latitude .. The area is also known for extensive Dipterocarp forests , comprising the northwestern parts of the ecoregion of Mizoram-Manipur-Kachin rain forests .. Dipterocarp. Dipterocarp. Mizoram-Manipur-Kachin rain forests. Mizoram-Manipur-Kachin rain forests
not_related.