With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Changchun Subway or Changchun Rail Transit is rail mass transit system in the city of Changchun, Jilin province, China.
text_B: Changchun Rail Transit is rail mass transit system in the city of Changchun, Jilin province, China.
entailment.