With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sarah Michelle Gellar was in a Drama Series that aired for 41 years.
text_B: Camilla Martelli -LRB- -- 30 May 1590 -RRB- was first the lover and then the second wife of the Grand Duke of Tuscany , Cosimo I de ' Medici .. Tuscany. Grand Duchy of Tuscany. Grand Duke of Tuscany. Grand Duke of Tuscany. She was the mother of Virginia de ' Medici , future Duchess of Modena .. Duchess of Modena. Duchess of Modena
not_related.