With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Wyatt Earp's first wife fell ill.
text_B: Silver Eensaar -LRB- born 29 July 1978 -RRB- is an Estonian orienteer , rogainer and adventure racer .. orienteer. orienteering. rogainer. rogaining. At the 10th World Rogaining Championships in Prebuz , Czech Republic in 2012 he won a gold medal and the title of the World Rogaining Champion in team with his brother Rain Eensaar in Men 's teams category .. World Rogaining Championships. World Rogaining Championships. Prebuz. Prebuz. Czech Republic. Czech Republic. Rain Eensaar. Rain Eensaar. At 11th World Rogaining Championships in Alol , Pskov oblast Russia in 2013 they successfully defended the title of the World Rogaining Champion .. World Rogaining Championships. World Rogaining Championships. Alol. Alol. Pskov. Pskov. At 12th World Rogaining Championships in Black Hills , South Dakota in 2014 they won the third consecutive title of World Rogaining Champions .. World Rogaining Championships. World Rogaining Championships. Black Hills. Black Hills. South Dakota. South Dakota. In 2011 he and his brother Rain won a gold medal and the title of the European Rogaining Champion in Rauna , Latvia .. Rauna. Rauna. Latvia. Latvia. At the European Adventure Race Championships he won a bronze medal in 2013 in Poland and a silver medal in 2014 in Turkey .. Poland. Poland. Turkey. Turkey. He has won two gold medals at Estonian orienteering championships .
not_related.