With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: In 1997, Titanic was released.
text_B: Sarracenia purpurea , commonly known as the purple pitcher plant , northern pitcher plant , or side-saddle flower , is a carnivorous plant in the family Sarraceniaceae .. Sarraceniaceae. Sarraceniaceae. Sarracenia. Sarracenia. carnivorous plant. carnivorous plant
not_related.