With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ulysses S. Grant wrote a biography of his own life.
text_B: Potassium channel tetramerisation domain containing 15 also known as BTB / POZ domain-containing protein KCTD15 is protein that in humans is encoded by the KCTD15 gene .. protein. protein. gene. gene
not_related.