With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Warren G. Harding was born in 1923.
text_B: Portsmouth Raceway Park is a three-eights mile dirt track located approximately 1 mile west of Portsmouth , Ohio .. dirt track. Dirt track racing. The track was built in 1990 by Owner / Operator Boone Coleman .. The track hosts weekly racing events throughout the summer months , including the classes , Late Model , Modified , Limited Late Model , and Bomber .. In 2009 the track hosted its first televised event , The `` Big Red Book '' River Days Rumble , featuring the Lucas Oil Late Model Series .. Lucas Oil Late Model Series. Lucas Oil Late Model Series. The series made two appearances at the track in 2010 , featuring one televised event , the two day `` Pepsi 75 -- River Days Rumble '' paying $ 20,000 to the winner .. In 2012 the ` crown jewel ' racing event , The Dirt Track World Championship , was hosted at the speedway .. The race , the thirty-second annual running of the event , paid $ 50,000 to the winner and was televised on the SPEED Network and sanctioned by the Lucas Oil Late Model Series .. Lucas Oil Late Model Series. Lucas Oil Late Model Series. The announcement was made during the D.T.W.C. weekend that the thirty-third annual hosting of the event would also take place at the speedway under Lucas Oil series sanction .
not_related.