With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There are programs aired on Nickelodeon targeted at younger children.
text_B: Mark Benjamin Jackson -LRB- born May 15 , 1969 -RRB- is a retired track and field athlete from Canada , who competed in the men 's 400m hurdles event .. track and field athlete. Track and field. Canada. Canada. He competed for his native country at the 1992 Summer Olympics in Barcelona , Spain , finishing in 19th place .. 1992 Summer Olympics. 1992 Summer Olympics. He was born in Toronto , Ontario .. In addition to his successes as a track and field athlete , Jackson is a world medalist in the sport of dragon boat racing .. track and field athlete. Track and field. As a member of the Slipstream Dragon Boat crew from Toronto , Ontario , Jackson won a bronze medal in the premier mixed 500 meter final at the Lee Kum Kee Dragon Boat Carnival and Club Crew World Championships in Hong Kong in 2012 .
not_related.