With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: London was founded in the year 43 by the Romans.
text_B: Ben Ferguson -LRB- born January 21 , 1995 -RRB- is an American snowboarder from Bend , Oregon who won the silver medal in the super-pipe at Winter X Games XX .. Winter X Games. Winter X Games. snowboarder. snowboarder. Winter X Games XX. Winter X Games XX
not_related.