With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gregor Clegane has a younger brother.
text_B: Uthina is also a spider genus -LRB- Pholcidae -RRB-. Uthina. Uthina ( spider ). Pholcidae. Pholcidae. Uthina or Oudna -LRB- Arabic  : اوذنة -RRB- was an ancient Roman-Berber city near Tunis , Tunisia .. Uthina. Uthina ( spider ). Tunisia. Tunisia. Arabic. Arabic. Roman. Roman Empire. Berber. Berbers. Tunis. Tunis
not_related.