With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nepal was ruled by a dynasty.
text_B: The Shah dynasty was the ruling dynasty of the Kingdom of Gorkha until 1768 and of the Kingdom of Nepal from 1768 to 28 May 2008 .. Kingdom of Gorkha. Gorkha Kingdom. Kingdom of Nepal. Kingdom of Nepal. Gorkha. Gorkha Kingdom. dynasty. dynasty
related.