With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: They were under the operational control of the Imperial Japanese Navy Air Service " Dai - Nippon Teikoku Kaigun Koku Hombu ".
text_B: They were under the operational control of the Imperial Japanese Navy Air Service (IJNAS or "Dai-Nippon Teikoku Kaigun Koku Hombu").
neutral.