With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Katy Perry is a dancer.
text_B: Tachornis is a genus of swift in the family Apodidae .. Apodidae. Apodidae. swift. swift. It contains the following species  :. Pygmy palm swift -LRB- Tachornis furcata -RRB-. swift. swift. Pygmy palm swift. Pygmy palm swift. Neotropical palm swift -LRB- Tachornis squamata -RRB-. Neotropical palm swift. Neotropical palm swift. swift. swift. Antillean palm swift -LRB- Tachornis phoenicobia -RRB-. swift. swift. Antillean palm swift. Antillean palm swift. Tachornis uranoceles -LRB- fossil ; Late Pleistocene of Puerto Rico -RRB-. fossil. fossil. Late Pleistocene. Late Pleistocene. Puerto Rico. Puerto Rico. Category  : Bird genera
not_related.