With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Ozarks are in Arkansas, Missouri, and Oklahoma.
text_B: Karl-Heinz Moehle -LRB- 31 July 1910 -- 17 November 1996 -RRB- was a German U-boat commander of the Second World War .. U-boat. U-boat. commander. commander. From September 1939 until retiring from front line service in June 1941 , he sank 21 ships for a total of .. For this he received the Knight 's Cross of the Iron Cross -LRB- Ritterkreuz des Eisernen Kreuzes -RRB- , among other commendations .. The Knight 's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership .
not_related.