With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dungeons & Dragons was designed by two guys.
text_B: Amida -LRB- Αμιδα , Amed -RRB- was an ancient city in Mesopotamia located where modern Diyarbakır , Turkey now stands .. Mesopotamia. Mesopotamia ( Roman province ). Diyarbakır. Diyarbakır. Turkey. Turkey. The Roman writers Ammianus Marcellinus and Procopius consider it a city of Mesopotamia .. Mesopotamia. Mesopotamia ( Roman province ). Ammianus Marcellinus. Ammianus Marcellinus. Procopius. Procopius. The city was located on the right bank of the Tigris .. Tigris. Tigris. The walls are lofty and substantial , and constructed of the recycled stones from older buildings .. recycled stones. spolia
not_related.