With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Harley Quinn has been portrayed by an actress.
text_B: Encaprin was a brand of coated aspirin made by Procter & Gamble in the mid-1980s .. aspirin. aspirin. Procter & Gamble. Procter & Gamble. In 1986 , the brand was involved in a cyanide poisoning hoax , and its sales never recovered .. cyanide. cyanide
not_related.