With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Avril Lavigne joined Epic Records.
text_B: Maritalea porphyrae is a Gram-negative , aerobic , motile bacterium from the genus of Maritalea which was isolated from the alga Porphyra yezoensis .. Maritalea. Maritalea. Gram-negative. Gram-negative. aerobic. Aerobic organism. Porphyra yezoensis. Porphyra yezoensis
not_related.