With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: South America isn't home to Orinoco River.
text_B: The Farmer 's Dendrobium -LRB- Dendrobium farmeri -RRB- is a species of orchid native to Asia .. Dendrobium. Dendrobium. orchid. orchid. Asia. Asia. It is native to the Himalayas -LRB- Nepal , Bhutan , Assam , Arunachal Pradesh , India , Bangladesh -RRB- and Indochina -LRB- Thailand , Myanmar , Laos , Peninsular Malaysia , and Vietnam -RRB- .. Himalayas. Himalayas. Nepal. Nepal. Bhutan. Bhutan. Assam. Assam. Arunachal Pradesh. Arunachal Pradesh. India. India. Bangladesh. Bangladesh. Indochina. Indochina. Thailand. Thailand. Myanmar. Myanmar. Laos. Laos. Peninsular Malaysia. Peninsular Malaysia. Vietnam. Vietnam
not_related.