With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Beatles had Stuart Sutcliffe initially serve as their bass player.
text_B: Ceromitia indigna is a species of moth of the family Adelidae .. Adelidae. Adelidae. Ceromitia. Ceromitia. moth. moth. It is known from South Africa .. South Africa. South Africa
not_related.