With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The London Penny Post was a premier postal system whose function was to deliver mail within London and its immediate suburbs for the modest sum of one penny.
text_B: The London Penny Post was a premier postal system whose function was to deliver mail within its immediate suburbs for the modest sum of one penny.
entailment.