Question: What is the Portuguese football agent whose clients include the manager for the Premier League club Manchester United, often referred to as?
Context: Manchester United Football Club is an English association football club based in Old Trafford, Greater Manchester, that competes in the Premier League.  Founded as Newton Heath LYR Football Club in 1878, the club changed its name to Manchester United in 1902.  During the 1889–90 season, Manchester United joined the Football Alliance.  The team was elected to The Football League in 1892, where the club remained until 1992, when the League's First Division was replaced as the top level of English football by the Premier League. László Csaba (born 13 February 1964 in Odorheiu Secuiesc, Harghita County, Romania) is a Hungarian football manager and former player.  He was the manager of Hungarian Premier League Club MTK Budapest, Belgian Pro League club Charleroi SC and of Scottish Premier League club Heart of Midlothian.  Previously to that, he had spells managing at Ferencvárosi TC, FC Sopron and the Ugandan and Lithuanian national team and Slovakian Premier League club Dunajská Streda. Romelu Menama Lukaku Bolingoli (born 13 May 1993) is a Belgian professional footballer who plays as a striker for Premier League club Manchester United and the Belgium national team.  He is one of only five players to score 50 Premier League goals before his 23rd birthday, and the fourth player (and first foreigner) to score 80 before his 24th birthday. Carlos Manuel Brito Leal Queiroz, (] ; born 1 March 1953), is a Portuguese football coach who is the current manager of the Iran national team.  He has also been the manager of the Portuguese national team and Spanish club Real Madrid, and was Alex Ferguson's assistant manager at English club Manchester United.  He has qualified three national teams to the World Cup, those being South Africa in 2002, Portugal in 2010, and Iran in 2014 and 2018. Northwich Victoria Football Club are an English football club based in Northwich, Cheshire.  They are currently competing in the Northern Premier League Premier Division.  The club was founded in 1874, playing challenge matches organised on an ad hoc basis until the 1877 season, when they entered the Welsh Cup for the first time.  The club entered two other competitions (The Cheshire Senior Cup in 1879 and the FA Cup in 1882) before finally playing league football in The Combination in 1890, for which they were founding members.  They became founding members of the Football League Second Division in 1892, where the club remained for two seasons, and are the only two seasons in the club's history where they have played professionally and in the Football League.  In the 1894 season, they returned to amateur, regional football when they rejoined the Combination.  Two season in the Cheshire League followed until the turn of the century, when Northwich joined the Manchester League in 1900, when they finished as runners-up.  Two seasons later, for the first time, they won a league trophy as winners of the Manchester League in 1902.  They departed the Manchester League in 1912 when they joined the second division of the Lancashire Combination, finishing 4th in the first season, which ensured their promotion to the first division.  In 1919, they became founder members of the Cheshire County League, where they remained until the 1968 season, winning the league just once in the 1956–57 season.  Following their departure from the Cheshire County League, they became founder members of the Northern Premier League.  In 1979, they founded yet another league, the Alliance Premier League (now known as the Football Conference, where they remained until their relegation in the 2004–05 season.  During their time in the Conference, they won the FA Trophy in the 1983–84 season, and finished runners-up twice in 1982 and 1995.  They returned to the Conference National at their first attempt when they won the Conference North in the 2005–06 season.  However, ongoing financial issues in the latter part of the 2000s saw them relegated twice in two season; in 2009 they were relegated back to the Conference North and then again the following season to the Northern Premier League Premier Division, where they are competing for the current season. The 2011–12 Premier League (known as the Barclays Premier League due to its sponsorship by the Barclays bank) was the 20th season of the Premier League since its establishment in 1992.  The season began on 13 August 2011 and ended on 13 May 2012 with Manchester City sealing their first league title since 1968 with victory over Queens Park Rangers on the final day.  The title was City's first Premier League success, making them the fifth club to win the Premier League in its 20-year history.  City finished level on 89 points with Manchester United, but their goal difference was eight better than their local rivals', making it the first time the Premier League had been won on goal difference and the first time a club previously relegated from the Premier League had won the title. Philip Anthony Jones (born 21 February 1992) is an English professional footballer who plays for Premier League club Manchester United and the England national team.  Before joining Manchester United, Jones played for Blackburn Rovers at both youth and senior levels.  Although primarily a centre-back, he has also been used as a right-back or defensive midfielder. José Mário dos Santos Mourinho Félix, (born 26 January 1963), known as José Mourinho (] ), is a Portuguese football manager and former football player.  He is the manager of Premier League club Manchester United. Jorge Paulo Agostinho Mendes (born 7 January 1966), better known simply as Jorge Mendes, is a Portuguese football agent.  He is registered with the Portuguese Football Federation and heads the GestiFute company, founded in 1996.  Mendes is among the most influential football agents in the world, with clients including Cristiano Ronaldo, David de Gea, Diego Costa, James Rodríguez, and José Mourinho.  Mendes is often referred to as a "super-agent". Willie McKay is a British football agent based in Monaco.  He is the agent of many top-level footballers, mainly based in England and France specifically the Premier League.  His clients include James McFadden, Joey Barton, Henri Camara, Scott McDonald, Jean-Joël Perrier-Doumbé, Charles N'Zogbia, Tyrone Mears, Amdy Faye, Ross McCormack, and Pascal Chimbonda.  He is also the agent of his twin sons, Jack and Paul McKay.
Answer: super-agent