With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The UH-1 was the first turbine-powered helicopter to enter production in 1960 for the United States military, and more than 16,000 have been built since.
text_B: The UH-2 was the first turbine - powered helicopter to enter production in 1960 for the United States military, and more than 16,000 have been built since.
contradiction.