Question: Katie Ledecky won three individual gold medals in the 2016 Olympics for swimming. Which famous swimmer did the same when she was 16-years-old?

Context articles: Debbie Meyer
Ian Thorpe
Ellie Cole
Swimming at the 2015 World Aquatics Championships
Ryk Neethling
Krisztina Egerszegi
Swimming at the 2015 Pacific Games
Katie Ledecky
Michael Phelps
Carl Osburn

Deborah Elizabeth Meyer (born August 14, 1952), also known by her married name Deborah Weber, is an American former competition swimmer, a three-time Olympic champion, and a former world record-holder in four events.
 Meyer won the 200-, 400-, and 800-meter freestyle swimming races in the 1968 Summer Olympics in Mexico City.
 While she was still a 16-year-old student at Rio Americano High School in Sacramento, California, she became the first swimmer to win three individual gold medals in one Olympics, winning the 200-, 400-, and 800-meter freestyle swimming races.
 Katie Ledecky is the only other female swimmer to have done the same, in the 2016 Summer Olympics in Rio.
Ian James Thorpe, {'1': ", '2': ", '3': ", '4': "} (born 13 October 1982) is a retired Australian swimmer who specialised in freestyle, but also competed in backstroke and the individual medley.
 He has won five Olympic gold medals, the most won by any Australian, and with three gold and two silver medals, was the most successful athlete at the 2000 Summer Olympics.
 At the 2001 World Aquatics Championships, he became the first person to win six gold medals in one World Championship.
 In total, Thorpe has won eleven World Championship golds, the third-highest number of any swimmer.
 Thorpe was the first person to have been named "Swimming World" Swimmer of the Year four times, and was the Australian Swimmer of the Year from 1999 to 2003.
 His athletic achievements made him one of Australia's most popular athletes, and he was recognised as the Young Australian of the Year in 2000.
Ellie Victoria Cole, {'1': ", '2': ", '3': ", '4': "} (born 12 December 1991) is an Australian Paralympic swimmer and wheelchair basketball player.
 After having her leg amputated due to cancer, she trained in swimming as part of her rehabilitation program and progressed more rapidly than instructors had predicted.
 She began competitive swimming in 2003 and first competed internationally at the 2006 IPC Swimming World Championships, where she won a silver medal.
 Since then, she has won medals in the Pan Pacific Swimming Championships, the Commonwealth Games, the Paralympic Games, the IPC Swimming World Championships, and various national championships.
 At the 2012 London Paralympics, she won four gold and two bronze medals.
 After the Games, she underwent two shoulder reconstructions and made a successful return to swimming at the 2015 IPC Swimming World Championships winning five medals including three gold medals.
 She represented Australia at the 2016 Rio de Janeiro Paralympics, winning two gold medals, three silver and a bronze.
Swimming at the 2015 World Aquatics Championships was held between 2 and 9 August 2015 in Kazan, Russia.
 The United States won the overall medal count, led by Katie Ledecky who claimed five gold medals.
Ryk Neethling OIS (born 17 November 1977) is a South African swimmer.
 He won an Olympic gold medal in the 4×100 m freestyle relay at the 2004 Summer Olympics.
 He won three individual gold medals at the 2006 FINA World Championships in Shanghai.
 9 time NCAA Champion and 1999 NCAA Swimmer of the Year.
 He is the former joint owner of the 4×100 m freestyle relay world record and broke the 100m Individual Medley World Record three times in 2005.
 He also is the first South African to compete in four successive Olympic Games.
Krisztina Egerszegi (] ; born 16 August 1974) is a Hungarian former world record holding swimmer and one of the greatest Hungarian Olympic champions of the modern era.
 She is a three-time Olympian (1988, 1992 and 1996) and five time Olympic champion; and one of three individuals (Dawn Fraser and Michael Phelps being the other two) to have ever won the same swimming event at three consecutive Summer Olympics.
 She is the most successful and greatest individual female swimmer ever, having won five individual Olympic gold medals, the only female swimmer to do so.
 Katie Ledecky of the United States matched her total of 5 Olympic gold medals, winning 1 individual gold in London 2012, 3 individual ones and one team gold in Rio in 2016.
Swimming at the 2015 Pacific Games in Port Moresby, Papua New Guinea was held on July 6–12, 2015.
 The pool was dominated in the women's events by New Caledonia's Lara Grangeon who won eight individual gold medals and was a team member in four gold medal-winning relays.
 Papua New Guinea's Ryan Pini won six individual gold medals in the men's events and was a team member in the gold medal-winning mixed 4×50 metre medley relay.
Kathleen Genevieve "Katie" Ledecky ( ; ] ; born March 17, 1997) is an American competitive swimmer.
 She is a five-time Olympic gold medalist and 14-time world champion, the most in history for a female swimmer.
 She is the current world-record holder in the women's 400-, 800-, and 1500-metre freestyle (long course).
 She also holds the fastest-ever times in the women's 500-, 1000-, and 1650-yard freestyle events.
Michael Fred Phelps II (born June 30, 1985) is an American former competitive swimmer and the most decorated Olympian of all time, with a total of 28 medals.
 Phelps also holds the all-time records for Olympic gold medals (23), Olympic gold medals in individual events (13), and Olympic medals in individual events (16).
 In winning eight gold medals at the 2008 Beijing Games, Phelps broke fellow American swimmer Mark Spitz's 1972 record of seven first-place finishes at any single Olympic Games.
 At the 2004 Summer Olympics in Athens, Phelps had 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.
Carl Townsend Osburn (May 5, 1884 – December 28, 1966) was a United States Navy officer and sports shooter from Jacksontown, Ohio.
 After graduating from the United States Naval Academy in 1906, Osburn went on to reach the rank of commander.
 He competed in the 1912 Summer Olympics, 1920 Summer Olympics, and 1924 Summer Olympics, winning a total of eleven Olympic medals: five gold medals (including two individual gold medals), four silver medals, and two bronze medals.
 He is the most successful shooter at the Olympic Games when individual and team medals are both taken into the account.
 His tally of eleven medals made him the all-time leading male medal winner for the United States at the Olympic Games.
 In 1972, Mark Spitz tied this record after having won four medals in 1968 and seven in 1972.
 Michael Phelps has since broken this record.