Question: Without Limits is a biographical sports film about what distance runner who competed in the 1972 Olympics?

Context paragraphs:
Paul Nihill: Vincent Paul Nihill (born 5 September 1939) is a retired British race walker.  He competed in the 50 km event at the 1964, 1968 and 1972 Olympics and won a silver medal in 1964.  In 1968 he suffered from the high altitude conditions of Mexico and collapsed at the 44th kilometre, which was his only defeat in 86 races between 1967 and 1970.  After that he focused on the 20 km distance, and won a European title in this event in 1969, followed by a bronze medal in 1971.  In July 1972 he set a world record in the 20 km, but finished only sixth at the 1972 Olympics.  He also competed in the 20 km walk in the 1976 Olympics, before retiring the following year.

Vera Nikolić: Vera Nikolić (Serbian Cyrillic: Вера Николић; born 23 September 1948) is a Serbian coach and retired middle-distance runner who competed at the 1968 and 1972 Olympics.  She had her best achievements in the 800 m event, in which she won European titles in 1966 and 1971 and set a world record on 20 July 1968.  She came to the 1968 Olympics as a favorite, but due to the pressure of being the favorite she gave up her semifinal – after leading it for 300 m she suddenly stepped off the track, walked back to the start, sat down and took off her shoes.  She set her personal best in 800 m at the 1972 Olympics, but this was only enough for a fifth place.

Aurel Vernescu: Aurel Vernescu (23 January 1939 – 1 December 2008) was a Romanian sprint canoeist.  He competed at the 1960, 1964, 1968 and 1972 Olympics and won three medals with a silver in 1972 in the K-4 1000 m and two bronze medals in 1964 in the K-1 1000 m and K-4 1000 m events.  He served as a flag bearer for Romania at the 1964, 1968 and 1972 Olympics.

Gunhild Hoffmeister: Gunhild Hoffmeister (born 6 July 1944) is a retired East German middle-distance runner.  She competed at the 1968 and 1972 Olympics and won two silver and one bronze medal, becoming the only German distance runner to win three Olympic medals.  Together with Hans Grodotzki she is the only German runner to win two medals at the same Olympics.  Her personal best time in 1500 metres was 4:01.4, achieved in July 1976 in Potsdam.  This places her ninth on the German all-time list.

Steve Prefontaine: Steve Roland "Pre" Prefontaine (January 25, 1951 – May 30, 1975) was an American middle and long-distance runner who competed in the 1972 Olympics.  Prefontaine once held the American record in seven different distance track events from the 2,000 meters to the 10,000 meters.  Prefontaine died in May 1975 at the age of 24 in an automobile accident in Eugene, Oregon.

Owen Phillips (sport shooter): Owen Phillips (born 9 July 1906, date of death unknown) was a Belizean sports shooter.  He competed at the 1972 Summer Olympics and the 1976 Summer Olympics.  At the 1972 Olympics, he competed in mixed 50 metre free pistol and mixed 50 metre rifle, prone.  At the 1976 Olympics, he competed in mixed 50 metre rifle, prone.

Without Limits: Without Limits is a 1998 biographical sports film.  It is written and directed by Robert Towne and follows the relationship between record-breaking distance runner Steve Prefontaine and his coach Bill Bowerman, who later co-founded Nike, Inc. Billy Crudup plays Prefontaine and Donald Sutherland plays Bowerman.  It also stars Monica Potter, Jeremy Sisto, Judith Ivey, Matthew Lillard and William Mapother.

Lyudmila Bragina: Lyudmila Ivanovna Bragina (Russian: Людмила Ивановна Брагина , born 24 July 1943) is a retired Russian middle distance runner.  She competed for the Soviet Union in the 1500 m at the 1972 and 1976 Olympics; she won the event in 1972 and finished fifth in 1976.  In July 1972 she set a new 1500 m world record at the Soviet championships, and then progressively improved it in round 1, semifinal and final of the 1972 Olympics.  The same year she was awarded the Order of the Red Banner of Labour.  She also set three world records in the 3000 m, in 1972, 1974 and 1976.  At the European Championships, Bragina won four silver medals: in the 3,000 m outdoors (1974), and in the 800 m (1970) and 1,500 m indoors (1971–72).

The Place Without Limits: The Place Without Limits (Spanish: El lugar sin límites , also released as Hell Without Limits) is a 1978 Mexican drama film directed by Arturo Ripstein, produced in Mexico and based on the 1966 novel of the same name written by Chilean José Donoso.  The film was selected as the Mexican entry for the Best Foreign Language Film at the 51st Academy Awards, but was not accepted as a nominee.

Knut Knudsen: Knut Knudsen (born 12 October 1950) is a retired Norwegian road and track cyclist.  As an amateur he competed on track in the individual 4000 m pursuit at the 1968 and 1972 Olympics and 1973 World Champsionships, and won the event in 1972 and 1973.  At the 1972 Olympics he also placed fifth in the 100 km team time trial on the road.  He won the Norwegian National Road Race Championships in 1972 and 1973.

Supporting paragraphs: Without Limits Steve Prefontaine
Answer: Steve Roland "Pre" Prefontaine