With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Seth Rogen was cast as the lead in a box.
text_B: The Gracies and the Birth of Vale Tudo is a promotional documentary film made from the interviews of the research material for the TV series `` Incessant '' , about the Brazilian Gracie family , who created Brazilian jiu-jitsu and the UFC .. Gracie family. Gracie family. Brazilian jiu-jitsu. Brazilian jiu-jitsu. UFC. UFC. The Gracies and the Birth of Vale Tudo was screened as a work in progress at the Sao Paulo International Film Festival and Festival do Rio .. Sao Paulo International Film Festival. Sao Paulo International Film Festival. Festival do Rio. Festival do Rio
not_related.