With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Richard Nixon was reelected.
text_B: The 2012 European Darts Open was the third of five European Tour events on the 2012 PDC Pro Tour .. PDC. Professional Darts Corporation. 2012 PDC Pro Tour. 2012 PDC Pro Tour. The tournament took place at the Maritim Hotel in Dusseldorf , Germany , from July 6 to 8 .. Dusseldorf. Dusseldorf. Germany. Germany. It featured a field of 64 players and # 82,100 in prize money , with # 15,000 going to the winner .. Raymond van Barneveld won the title , defeating Dave Chisnall 6 -- 4 in the final .. Raymond van Barneveld. Raymond van Barneveld. Dave Chisnall. Dave Chisnall. This was Chisnall 's second successive defeat in a European Tour final .
not_related.