With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The album Up All Night was released by Harry Styles and his bandmates.
text_B: PP cells , or gamma cells , are cells which produce pancreatic polypeptides in the pancreatic islets -LRB- Islets of Langerhans -RRB- of the pancreas .. gamma. gamma. cells. cell ( biology ). pancreatic islets. pancreatic islets. pancreas. pancreas. They are very few in number and are polygonal in shape .. PP cells have very few organelles and few granules .. cells. cell ( biology ). Category  : Sequestering cells. cells. cell ( biology ). Category  : Endocrine cells. cells. cell ( biology )
not_related.