With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Colombia has a number of species.
text_B: Petronella Barker may refer to  :. Petronella Barker -LRB- actress , born 1942 -RRB- , British actress. Petronella Barker -LRB- actress , born 1965 -RRB- , British-born Norwegian actress
not_related.