With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rey Mysterio won the nineteenth annual SummerSlam professional wrestling PPV event.
text_B: Piotr Siemionowski -LRB- born June 6 , 1988 in Mragowo -RRB- is a Polish sprint canoeist who has been competing since the late 2000s .. Mragowo. Mragowo. Polish. Poland. sprint canoeist. canoe racing. He won a World Champion title in the K-1 200 m event at the 2011 ICF Canoe Sprint World Championships in Szeged , Hungary .. World Championships. ICF Canoe Sprint World Championships. 2011 ICF Canoe Sprint World Championships. 2011 ICF Canoe Sprint World Championships. Szeged. Szeged. Hungary. Hungary. Siemionowski trains in the Zawisza Bydgoszcz .. Zawisza Bydgoszcz. Zawisza Bydgoszcz
not_related.