Question: Who won the most medals in the olympics?

Disambiguated questions and answers:
context: No context provided
question: Who won the most medals in the Summer Olympics?
short_answers: Michael Phelps

context: Norwegian cross-country skier Marit Bjørgen is the most decorated Winter Olympian, with 15 medals (8 gold, 4 silver, and 3 bronze).
question: Who won the most medals in the Winter Olympics?
short_answers: Marit Bjørgen
wikipage: List of multiple Olympic medalists

context: No context provided
question: Which country won the most medals in the Summer Olympics?
short_answers: United States

context: No context provided
question: Which country won the most medals in the Winter Olympics?
short_answers: Norway

Long answers:
knowledge: content: Michael Fred Phelps II[5] (born June 30, 1985)[6] is an American former competitive swimmer. He is the most successful and most decorated Olympian of all time[7] with a total of 28 medals.[8] Phelps also holds the all-time records for Olympic gold medals (23),[9] Olympic gold medals in individual events (13), and Olympic medals in individual events (16)
wikipage: Michael Phelps

content: At the 2004 Summer Olympics in Athens, Phelps already tied the record of eight medals of any color at a single Games by winning six gold and two bronze medals. At the 2012 Summer Olympics in London, Phelps won four gold and two silver medals, and at the 2016 Summer Olympics in Rio de Janeiro, he won five gold medals and one silver. This made him the most successful athlete of the Games for the fourth Olympics in a row.
wikipage: Michael Phelps

content:  A five-time Olympian, her five Olympic medals at the 2018 Pyeongchang Games brought her total number of medals up to a record 15, the most by any athlete in Winter Olympics history.
wikipage: Marit Bjørgen

content: American athletes have won a total of 2,673 medals (1,075 of them gold) at the Summer Olympic Games and another 307 (105 of them gold) at the Winter Olympic Games, making the United States the most prolific medal-winning nation in the history of the Olympics.
wikipage: United States at the Olympics

content: At the Winter Olympic Games, Norway has won 368 total medals including 132 gold medals, both considerably more than any other nation in Winter Olympic history. More than half of these medals have come from cross-country skiing and speed skating. 
wikipage: Norway at the Olympics
long_answer: Michael Phelps is an American former competitive swimmer. He is the most successful and most decorated Olympian of all time with a total of 28 medals. Phelps also holds the all-time records for Olympic gold medals with 23, Olympic gold medals in individual events with 13 and Olympic medals in individual events with 16. Phelps won the most medals of any athlete in the Summer Olympic games in 2004, 2008, 2012 and 2016. In the Winter Olympics, Marit Bjørgen is a is a Norwegian cross-country skier. A five-time Olympian, her five Olympic medals at the 2018 Pyeongchang Games brought her total number of medals up to a record 15, the most by any athlete in Winter Olympics history. American athletes have won a total of 2,673 medals, 1,075 of them gold, at the Summer Olympic Games and another 307, 105 of them gold, at the Winter Olympic Games, making the United States the most prolific medal-winning nation in the history of the Olympics. Additionally, the United States has won the most medals of any nation in Summer Olympics history. At the Winter Olympic Games, Norway has won 368 total medals including 132 gold medals, more than any other nation in Winter Olympics history. More than half of Norway's medals have come from cross-country skiing and speed skating.