With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Aaron Carter is Texan.
text_B: Sev Berd or Black Fortress -LRB- Սև բերդ Черная Крепость , Chornaya Krepost -RRB- is an abandoned Russian imperial fortress in Gyumri , Shirak Province , Armenia .. Gyumri. Gyumri. Shirak Province. Shirak Province. Armenia. Armenia. Russian imperial. Imperial Russian Army. The fortress , which lies 8 km from the Turkish border , was built in response to the Russo-Turkish War of 1828 -- 1829 .. Russo-Turkish War. Russo-Turkish War ( 1828–29 ). It is a national cultural heritage monument in Armenia .. Armenia. Armenia
not_related.