With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Centralia, Pennsylvania is a borough.
text_B: The National Union of Printing , Bookbinding and Paper Workers -LRB- NUPBPW -RRB- was a British trade union .. British. United Kingdom. trade union. trade union. The union was founded in 1921 as the National Union of Printing , Bookbinding , Machine Ruling and Paper Workers when the National Union of Bookbinders and Machine Rulers and the National Union of Printing and Paper Workers merged .. National Union of Bookbinders and Machine Rulers. National Union of Bookbinders and Machine Rulers. National Union of Printing and Paper Workers. National Union of Printing and Paper Workers. The Platen Printing Machine Minders ' Society and the London Society of Machine Rulers soon also joined .. London Society of Machine Rulers. London Society of Machine Rulers. London. London. In 1926 , its central London branch broke away , but rejoined in 1931 .. London. London. In 1928 , the union dropped `` machine ruling '' from its name .. By 1960 , the union over 160,000 members .. Following mergers with several small unions , in 1966 it joined with the National Society of Operative Printers and Assistants to form the Society of Graphical and Allied Trades .. Society of Graphical and Allied Trades. Society of Graphical and Allied Trades. National Society of Operative Printers and Assistants. National Society of Operative Printers and Assistants
not_related.