With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The device is colloquially referred to as a hydrogen bomb or, an H-bomb, because it employs the fusion of isotopes of hydrogen.
text_B: The device is colloquially referred to as, an H - bomb, because it employs the fusion of isotopes of hydrogen.
entailment.