With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Pornhub is a private video website.
text_B: Robert Juckel -LRB- born -RRB- is a German male artistic gymnast , representing his nation at international competitions .. artistic gymnast. artistic gymnast. He participated at the 2004 Summer Olympics and 2008 Summer Olympics .. 2004 Summer Olympics. Gymnastics at the 2004 Summer Olympics. 2008 Summer Olympics. Gymnastics at the 2008 Summer Olympics. He won the bronze medal in the team event at the 2007 World Artistic Gymnastics Championships .. 2007 World Artistic Gymnastics Championships. 2007 World Artistic Gymnastics Championships
not_related.