With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Afghanistan is the source of the Khilji dynasty.
text_B: Lmechrek is a small town and rural commune in Sidi Bennour Province of the Casablanca-Settat region of Morocco .. Casablanca-Settat. Casablanca-Settat. Province. Provinces of Morocco. Sidi Bennour. Sidi Bennour Province. rural commune. List of municipalities, communes, and arrondissements of Morocco. Sidi Bennour Province. Sidi Bennour Province. Morocco. Morocco. At the time of the 2004 census , the commune had a total population of 14,853 people living in 2474 households .. 2004 census. 2004 Moroccan census
not_related.