With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: No estimates exist on how many people are trafficked each year in the Mekong region , but the United Nations Children 's Fund believes some 200,000 people have been trafficked across the entire Asia-Pacific region .
text_B: United Nations Children 's Fund is an artefact
not-entailed.