With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: The region where the cold waters of the ACC meet and mingle with the warmer waters of the north defines a distinct border - the Antarctic Convergence - which fluctuates with the seasons , but which encompasses a discrete body of water and a unique ecologic region .
text_B: Antarctic Convergence is a geographical/political entity
not-entailed.