With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Beach Boys leader was not Brian Wilson.
text_B: Niall Morris may refer to  :. Niall Morris -LRB- singer -RRB- -LRB- born 1975 -RRB- , Irish classical singer and producer. Niall Morris -LRB- rugby union -RRB- -LRB- born 1988 -RRB- , Irish rugby union footballer
not_related.