With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: And all of this is happening in a region , which only 30 years ago , was believed to be the next wealthy part of the world , and in a Moslem area , which developed , at some point in history , one of the most advanced cultures in the world .
text_B: The happening did not happen
not-entailed.