With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: In Fall 2004 , MSNBC , relying on an unnamed FBI spokesperson , reports that the FBI has narrowed the pool of labs known to have had Ames that was a match from 16 to 4 but can not rule out that it was made overseas .
text_B: The narrowing did not happen
not-entailed.