With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Taxonomic studies in 2006 limited the genus to four species, but a fifth, "Cryphonectria naterciae", was described in 2011 from Portugal.
text_B: Taxonomic studies in 2007 limited the genus to four species, but a fifth, "Cryphonectria naterciae", was described in 2011 from Portugal.
contradiction.