With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Neighbors stars the actor Zac Efron.
text_B: Gentiana villosa , the striped gentian or Sampson 's snakeroot , is a herbaceous perennial plant belonging to the genus Gentiana .. Gentiana. Gentiana. perennial plant. perennial plant. It is found mainly in the Eastern United States and is used medicinally by Native American tribes .. Native American. Indigenous peoples of the Americas
not_related.