With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Hungary was founded by a prince.
text_B: Maria Sharapova was the defending champion , but she was defeated in the third round to thirtieth seed Agnieszka Radwanska .. Maria Sharapova. Maria Sharapova. Agnieszka Radwanska. Agnieszka Radwanska. Justine Henin claimed the title without dropping a set , and defeating 2004 champion Svetlana Kuznetsova in the final , 6 -- 1 , 6 -- 3 .. Justine Henin. Justine Henin. Svetlana Kuznetsova. Svetlana Kuznetsova. 2004 champion. 2004 US Open – Women's Singles. This would be her last Grand Slam title , and as well as her final US Open appearance .. Future champion and World No. 1 Angelique Kerber appeared in the main draw of the US Open for the first time .. World No. 1. List of WTA number 1 ranked tennis players. Angelique Kerber. Angelique Kerber. She lost to Serena Williams in the first round .. Serena Williams. Serena Williams
not_related.