With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cosmopolitan as of 2011 contains content which includes articles on political dialogue.
text_B: Michael Ruben Rinaldi -LRB- born 21 December 1995 in Rimini -RRB- is an Italian motorcycle racer .. Rimini. Rimini. Italian. Italy. motorcycle racer. Motorcycle racing. He is currently competing in the European Superstock 1000 Championship aboard a Ducati 1199 Panigale .. European Superstock 1000 Championship. FIM Superstock 1000 Cup. Ducati 1199 Panigale. Ducati 1199 Panigale. Rinaldi has also previously competed in the European Superstock 600 Championship , the CIV Moto3 Championship and the Coppa Italia 125cc 2T , where he was champion in 2011 .. European Superstock 600 Championship. European Superstock 600 Championship
not_related.