Question: What Irish footballer joined Pacific Films in 1950?

full_context: Document 1: WingNut Films: WingNut Films is a New Zealand production company based in Wellington, New Zealand. It is notable for producing and collaborates predominantly with filmmaker Peter Jackson. WingNut films also has produced at Pinewood Studios in England.
Document 2: John O'Shea: John Francis O'Shea (born 30 April 1981) is an Irish footballer, who plays as a defender for Sunderland and the Republic of Ireland national team, where he serves as vice-captain. He is known for his versatility in playing several positions on either side of the pitch or the centre.
Document 3: MZ Pictures: MZ Pictures is a specialized film and TV production company based incorporated in 2009 in Shanghai, China，whose precursor is the MZ Film Workshop founded by Mi Zi, who has been involved in the production of numerous award-winning documentaries, feature films, commercials, TV series and stage plays.
Document 4: Pathé News: Pathé News was a producer of newsreels and documentaries from 1910 until 1970 in the United Kingdom. Its founder, Charles Pathé, was a pioneer of moving pictures in the silent era. The Pathé News archive is known today as British Pathé. Its collection of news film and movies is fully digitised and available online.
Document 5: James Milner: James Philip Milner (born 4 January 1986) is an English professional footballer who plays for Premier League club Liverpool. A versatile player, he has been utilized in many different positions such as on the wing, in midfield and left back.
Document 6: Johnny Carey: John James "Johnny" Carey (23 February 1919 – 22 August 1995), also known as Jackie Carey, was an Irish professional footballer and manager. As a player Carey spent most of his career at Manchester United, where he was team captain from 1946 until he retired as a player in 1953. He was also a dual internationalist, playing for and captaining both Ireland teams – the FAI XI and the IFA XI. In 1947 he also captained a Europe XI which played a Great Britain XI at Hampden Park. In 1949 he was voted the Football Writers' Association Footballer of the Year and in the same year captained the FAI XI that defeated England 2–0 at Goodison Park, becoming the first non-UK team to beat England at home. Carey was also the first non-UK player and the first Irishman to captain a winning team in both an FA Cup Final and the First Division. Like his contemporary Con Martin, Carey was an extremely versatile footballer and played in nine different positions throughout his career. He even played in goal for United on one occasion.
Document 7: Filmwala Pictures: Filmwala Pictures is a Pakistani Film Production Company which is based in Karachi; the Production house was founded by Fizza Ali Meerza, who also produces the films for the production company. Nabeel Qureshi has directed three films for the production company; "Na Maloom Afraad", and "Actor in Law". and "Na Maloom Afraad 2". Fizza Ali Meerza has also served as writer and producer for the films.
Document 8: Pacific Films: The Pacific Film Unit was established in Wellington, New Zealand in 1948 by ex-National Film Unit staff Alun Falconer and Roger Mirams. At this time most films produced in New Zealand were documentaries made by the government’s National Film Unit. In 1950 John O'Shea joined; Falconer left to pursue a career in China; and the company changed its name to Pacific Film Productions Ltd.
Document 9: Powell and Pressburger: The British film-making partnership of Michael Powell (1905–1990) and Emeric Pressburger (1902–1988)—together often known as The Archers, the name of their production company—made a series of influential films in the 1940s and 1950s. —24 films between 1939 and 1972—were mainly derived from original stories by Pressburger with the script written by both Pressburger & Powell. Powell did most of the directing while Pressburger did most of the work of the producer and also assisted with the editing, especially the way the music was used. Unusually, the pair shared a writer-director-producer credit for most of their films. The best known of these are "The Life and Death of Colonel Blimp" (1943), "A Canterbury Tale" (1944), "A Matter of Life and Death" (1946), "Black Narcissus" (1947), "The Red Shoes" (1948), and "The Tales of Hoffmann" (1951).
Document 10: John Terry: John George Terry (born 7 December 1980) is an English professional footballer who plays for and captains Championship club Aston Villa. He commonly plays as a centre-back. He was previously captain of Chelsea and the England national team.
Document 11: Eric Dier: Eric Jeremy Edgar Dier (born 15 January 1994) is an English professional footballer who plays for Premier League club Tottenham Hotspur and the England national team. A versatile defensive player, Dier has been deployed as a defensive midfielder, a centre-back and a right-back.
Document 12: Silver Screen Pictures: Silver Screen Pictures was first established in 2004 under the original name Silver Screen Productions before registering as Australian business, Silver Screen Pictures in 2006. The film, media and production company was first established in Brisbane, Australia by Director Alex Barnes and later partnered with by his Producer Justin Morrissey in early 2009. The company still currently operates out of Brisbane and work predominately in Music Videos and documentary Production.
Document 13: Abingdon Film Unit: The Abingdon Film Unit (known as the AFU) is a small organisation based at Abingdon School in Oxfordshire, England that enables secondary school pupils between the ages of 13 and 18 to make their own short documentary or animated films under the guidance of a team of industry professionals. The AFU was formed in 2003 by renowned British documentary maker Michael Grigsby and the school's Head of Drama, Jeremy Taylor. They led the Unit together until Grigsby's death at the age of 76 in March 2013. By then, they had assembled a formidable team of tutors; Jonas Mortensen (cinematography), Mikkel Eriksen and Larry Sider (sound design), Nikolaj Larsen and Arvid Eriksson (editing), Colin O'Toole, Duncan Pickstock and Rebekah Tolley (direction), and animators Joanna Harrison and Geoff Dunbar. The Unit has so far produced around a hundred short films, many of which have won prizes or received screenings at festivals in the UK and abroad. Most of the films can be viewed at the Unit's official website (http://www.abingdonfilmunit.com). The influence of Grigsby's distinctive philosophy and aesthetic - using the medium of film "to give voice to the voiceless", explore "the poetry of the everyday" and allow audiences time and space in which to make their own judgements about the material - are often discernible in AFU documentaries, whilst AFU animations celebrate a hand-drawn or hand-made approach.
Document 14: Michael Carrick: Michael Carrick (born 28 July 1981) is an English professional footballer who plays for Manchester United, whom he also captains, and the England national team. Carrick primarily plays as a central midfielder, but he has been used as an emergency centre-back under Alex Ferguson, David Moyes and Louis van Gaal. Distinctive features of his play include his inventive distribution of the ball along with his passing and crossing abilities. He is one of the most decorated English footballers of all time.
Document 15: Stephen Ireland: Stephen James Ireland (born 22 August 1986) is an Irish professional footballer who plays as an attacking midfielder for Premier League club Stoke City.
ground_truth: John Francis O'Shea