With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mango is a national tree.
text_B: The 2014 Dubai Darts Masters was the second staging of the tournament organised by the Professional Darts Corporation .. Dubai. Dubai. Professional Darts Corporation. Professional Darts Corporation. It was the first World Series of Darts event of 2014 .. The tournament featured the top six players according to the Order of Merit , plus two wildcards , competing in a knockout system .. Order of Merit. PDC Order of Merit. The tournament was held at the Dubai Tennis Centre in Dubai over 29 -- 30 May 2014 .. Dubai Tennis Centre. Dubai Tennis Centre. Dubai. Dubai. Michael van Gerwen was the defending champion and he retained his title by defeating Peter Wright 11 -- 7 in the final .. Michael van Gerwen. Michael van Gerwen. Peter Wright. Peter Wright ( darts player )
not_related.