Question: When was the Northern Irish professional snooker player on which "The Rack Pack" focused on his rivalry born? 

full_context: Document 1: Mark Allen (snooker player): Mark Allen (born 22 February 1986) is a Northern Irish professional snooker player. He won the World Amateur Championship in 2004. The following year he entered the Main Tour and took only three seasons to reach the elite top 16. As a prolific break-builder, Allen has compiled more than 300 century breaks in professional competition.
Document 2: The Rack Pack: The Rack Pack is a 2016 British comedy-drama television film about professional snooker during the 1970s through the 1980s, focusing on the intense rivalry between Alex Higgins and Steve Davis. The film is directed by Brian Welsh and was released on BBC iPlayer on 17 January 2016.
Document 3: Alex Higgins: Alexander Gordon "Alex" Higgins (18 March 1949 – 24 July 2010) was a Northern Irish professional snooker player, who is remembered as one of the most iconic figures in the game. Nicknamed Hurricane Higgins because of his fast play, he was World Champion in 1972 and 1982, and runner-up in 1976 and 1980. He won the UK Championship in 1983 and the Masters in 1978 and 1981, making him one of ten players to have completed snooker's Triple Crown. He was also World Doubles champion with Jimmy White in 1984, and won the World Cup three times with the All-Ireland team.
Document 4: Steve Davis: Steve Davis, {'1': ", '2': ", '3': ", '4': "} (born 22 August 1957) is an English retired professional snooker player from Plumstead, London. Known for dominating the sport during the 1980s, when he won the World Championship six times and was ranked world number one for seven consecutive seasons, he is remembered particularly for contesting the 1985 World Championship final with Dennis Taylor, the black-ball conclusion of which attracted a record 18.5 million British viewers. He is a well known public figure and is generally viewed by his peers as one of the greatest players of all time. Until his retirement in 2016, Davis combined his ongoing playing career with his role as a television analyst and commentator for the BBC's snooker coverage, alongside being a DJ of electronic music on local radio station Phoenix FM and at the Bloc Weekend music festival.
Document 5: Dennis Taylor: Dennis Taylor (born Denis Taylor, 19 January 1949 in Coalisland, County Tyrone, Northern Ireland) is a retired professional snooker player and current BBC snooker commentator.
Document 6: Snooker season 2012/2013: The 2012/2013 snooker season was a series of snooker tournaments played during 2012 and 2013. The season featured two new ranking events; the Wuxi Classic and the International Championship. The tour had a record five ranking events in China, and three new PTC events in Asia. The tour also visited Bulgaria for the first time in its history, and returned to Poland, Belgium and Australia. Before the start of the season World Snooker requested every player to sign a players contract, that would allow players to choose which events they want to enter – no player was forced to play in any event. At the end of the season Mark Selby was named the "World Snooker Player of the Year", the "Snooker Writers' Player of the Year" and the "Fans' Player of the Year" and Ian Burns the "Rookie of the Year". Ronnie O'Sullivan received the "Performance of the Year" for winning his fifth World title after playing just one competitive match during the season. Jimmy Robertson's 57 break in just 130 seconds at the Snooker Shoot-Out received the "Magic Moment of the Year" award. Terry Griffiths, Joe Johnson, Peter Ebdon, Ken Doherty, Graeme Dott, Shaun Murphy and Neil Robertson were inducted into the Hall of Fame.
Document 7: Shaun Murphy (snooker player): Shaun Murphy (born 10 August 1982) is an English professional snooker player, who won the 2005 World Championship. Nicknamed "The Magician", Murphy is noted for his straight cue action and his long potting.
Document 8: 1985 World Snooker Championship final: The 1985 World Snooker Championship final, commonly known as the black ball final, was a snooker match played on the weekend of 27/28 April 1985 at the Crucible Theatre in Sheffield, England. It was contested between defending World Champion Steve Davis and Northern Irishman Dennis Taylor, appearing in his second final. Taylor produced a determined comeback to win the match on the final ball of the final frame, sealing his only world title. The result was a major shock, as Davis was the heavy favourite, having won three of the previous four world championships.
Document 9: Ronnie O'Sullivan: Ronald Antonio "Ronnie" O'Sullivan, {'1': ", '2': ", '3': ", '4': "} (born 5 December 1975) is an English professional snooker and pool player. He is widely regarded as one of the greatest snooker players of all time. He is noted for his rapid playing style, mercurial temperament, and his ambivalent relationship with the sport, from which he has taken prolonged sabbaticals and repeatedly threatened to retire. O'Sullivan is based at the Legends Snooker Academy in Leytonstone, England, United Kingdom.
Document 10: Racking focus: A rack focus in filmmaking and television production is the practice of changing the focus of the lens during a shot. The term can refer to small or large changes of focus. If the focus is shallow, then the technique becomes more noticeable. In professional films, a camera assistant called a focus puller is responsible for rack focusing. In his documentary film, "The Sinister Saga of Making "The Stunt Man"" the director Richard Rush claims he developed the technique in the 1960s. In the commentary to the TV series "Firefly", visual effects supervisor Loni Peristere comments that rack focus has been taboo in recent cinematography because such shots cannot be "repaired" in post production.
Document 11: Snooker season 2011/2012: The 2011/2012 snooker season was a series of snooker tournaments played between 1 June 2011 and 7 May 2012. The Brazil Masters became the first professional event held in South America, and the Australian Goldfields Open the first ranking event in Australia. The World Cup was held again after 1996. At the end of the season Ronnie O'Sullivan was named the "World Snooker Player of the Year" and the "Snooker Writers Player of the Year", Judd Trump the "Fans Player of the Year" and Luca Brecel the "Rookie of the Year". Stuart Bingham received the "Performance of the Year" for winning his first ranking event, the Australian Goldfields Open. Stephen Hendry's maximum break at the World Championship received "The Magic Moment" award. Walter Donaldson, Mark Williams, John Higgins and Ronnie O'Sullivan were inducted into the Hall of Fame.
Document 12: 2016 UK Championship: The 2016 Betway UK Championship was a professional ranking snooker tournament that took place from 22 November to 4 December 2016 at the Barbican Centre in York, England. It was the tenth ranking event of the 2016/2017 season.
Document 13: Snooker world ranking points 2017/2018: The official 2017/2018 snooker world ranking points for the professional snooker players on the World Snooker Main Tour in the 2017/2018 season are based on performances in ranking and minor-ranking tournaments over a two-year rolling period. The rankings at the start of 2017/2018 season are determined by prize money earned in the 2015/2016 and 2016/2017 seasons and are updated after every tournament carrying ranking status. As points are accrued from tournaments throughout the current season, the points from the corresponding tournaments from two seasons earlier are dropped. The rankings set the official seedings at the start of the season and at various further stages. The total points accumulated by the cut-off dates for the revised seedings are based on all the points up to that date in the 2017/2018 season, all of the points from the 2016/2017 season, and the points from the 2015/2016 season that have not yet been dropped. Note that the table below gives just those rankings that are used for seeding tournaments. Other rankings are produced after each ranking event which are not noted here. The total points from the 2016/2017 and 2017/2018 seasons set the rankings at the start of the 2018/2019 season.
Document 14: Peter Ebdon: Peter David Ebdon (born 27 August 1970) is an English professional snooker player. He was World Champion in 2002, beating Stephen Hendry 18–17 in the final, and won the UK Championship in 2006 and 7 other ranking events between 1993 and 2012. He was also a losing finalist in the World Championship in 1996 and 2006. Ebdon turned professional in 1991 and soon made an impact by beating six-time world champion Steve Davis 10–4 in the first round of the 1992 World Championship and reaching the quarter-final stage.
Document 15: Matchroom Sport: Matchroom Sport is a sport event promotions company led by the founder and owner English entrepreneur Barry Hearn and his son Eddie. It first came to attention in the sports of snooker and boxing and is also involved in pool, bowling, golf (see PGA EuroPro Tour), fishing, darts, ping pong, and poker and as of late 2016 gymnastics. The company is based in Brentwood, Essex.
ground_truth: 18 March 1949