With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Britney Spears released an album in 1999.
text_B: Taphrina aurea is an ascomycete fungus that is a plant pathogen .. Taphrina. Taphrina. ascomycete. ascomycete. plant pathogen. plant pathogen. It causes leaf blisters on poplar trees .. poplar trees. Populus
not_related.