With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Paleogene is a geologic system that spans 41 million years.
text_B: The Postmen 's Federation was a trade union representing postal workers in the United Kingdom .. trade union. trade union. United Kingdom. United Kingdom. In 1889 , a `` Postmen 's Union '' was founded in Clerkenwell by Tom Dredge and John Lincoln Mahon .. Clerkenwell. Clerkenwell. John Lincoln Mahon. John Lincoln Mahon. This dissolved after many of its members were sacked , but two years later , C. Churchfield established the `` Postmen 's Federation '' as a more cautious organisation .. It immediately recruited 3,721 members , and survived , offering welfare benefits to members from 1895 and publishing The Postmen 's Gazette .. By 1901 , the union was becoming more confident , and felt able to affiliate to the Trades Union Congress and the Labour Representation Committee .. Trades Union Congress. Trades Union Congress. Labour Representation Committee. Labour Representation Committee ( 1900 ). Membership was over 31,000 by 1906 .. In 1912 , George Harold Stuart was elected as general secretary ; Duncan Campbell-Smith describes him as the `` single most impressive officer among all the postal union staffs '' .. George Harold Stuart. George Harold Stuart. Under his leadership , the union began admitting women .. It negotiated a merger with the Fawcett Association and the Postal and Telegraph Clerks ' Association in 1919 , forming the Union of Post Office Workers .. Fawcett Association. Fawcett Association. Union of Post Office Workers. Union of Post Office Workers
not_related.