With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Avengers (2012 film) includes, prominently, an American actor born in the year 1981.
text_B: The 2009 Euroleague Final Four was the concluding Euroleague Final Four tournament of the 2008 -- 09 Euroleague season .. 2007–08 Euroleague Final Four. Euroleague Final Four. Euroleague Final Four. It was held on May , 2009 .. All of the games were held at the O2 World , in Berlin Germany .. Berlin. Berlin. Germany. Germany. O2 World. O2 World ( Berlin ). Panathinaikos won the title , which was their fifth at the time .. Panathinaikos. Panathinaikos B.C.
not_related.