With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Harald V of Norway has a wife.
text_B: Harald V -LRB- -LSB- ˈhɑrːɑɫ -RSB- ; born 21 February 1937 -RRB- is the King of Norway , having ascended the throne following the death of his father on 17 January 1991 .. King of Norway. King of Norway. Norway. Norway. Harald was the third child and only son of Olav V of Norway and Princess Martha of Sweden .. Olav V. Olav V of Norway. Olav V of Norway. Olav V of Norway. Princess Martha of Sweden. Princess Martha of Sweden. Norway. Norway. Martha. Princess Martha Louise of Norway. He was second in the line of succession at the time of his birth , behind his father .. line of succession. Line of succession to the Norwegian throne. In 1940 , as a result of the German occupation during World War II , the royal family went into exile .. German occupation. German occupation of Norway. Harald spent part of his childhood in Sweden and the United States .. He returned to Norway in 1945 , and subsequently studied for periods at the University of Oslo , the Norwegian Military Academy , and Balliol College , Oxford .. Norway. Norway. University of Oslo. University of Oslo. Norwegian Military Academy. Norwegian Military Academy. In 1957 , following the death of his grandfather , Haakon VII , Harald became crown prince .. Haakon VII. Haakon VII of Norway. Haakon. Haakon, Crown Prince of Norway. A keen sportsman , he represented Norway in sailing at the 1964 , 1968 , and 1972 Olympic Games , and later became patron of World Sailing .. Norway. Norway. Sailing at the 1964 Summer Olympics. Sailing at the 1968 Summer Olympics. 1972 Olympic Games. Sailing at the 1972 Summer Olympics. World Sailing. World Sailing. Harald married Sonja Haraldsen in 1968 , with their relationship initially being controversial due to her status as a commoner .. Sonja Haraldsen. Queen Sonja of Norway. Sailing at the 1968 Summer Olympics. commoner. commoner. The couple had two children , Martha and Haakon .. Martha. Princess Martha Louise of Norway. Haakon. Haakon, Crown Prince of Norway. Harald succeeded his father as king in 1991 , with Haakon becoming his heir apparent .. Haakon. Haakon, Crown Prince of Norway. heir apparent. heir apparent
related.