With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: My Bloody Valentine 3D was directed by a Canadian-American filmmaker and editor born in the 1960s.
text_B: Haplogroup R may refer to  :. Haplogroup R -LRB- mtDNA -RRB- , a human mitochondrial DNA -LRB- mtDNA -RRB- haplogroup. Haplogroup R -LRB- Y-DNA -RRB- , a human Y-chromosome -LRB- Y-DNA -RRB- haplogroup
not_related.