Question: Which person Jim Cassell has been responsible for the development of plays for Premier League club Liverpool and the England national team?

Context articles: Danny Ings
Jon Flanagan
Daniel Sturridge
Trent Alexander-Arnold
Alex Oxlade-Chamberlain
Joe Hart
Nathaniel Clyne
Jessica Clarke
Jordan Henderson
Jim Cassell

Daniel William John Ings (born 23 July 1992) is an English professional footballer who plays as a forward for Premier League club Liverpool and the England national team.
Jonathon Patrick Flanagan (born 1 January 1993) is an English professional footballer who plays as a full back for Premier League club Liverpool, and the England national team.
 He made his debut for Liverpool in a 3–0 win against Manchester City on 11 April 2011 at age 18.
Daniel Andre Sturridge ( ; born 1 September 1989) is an English professional footballer who plays for Premier League club Liverpool and the England national team.
 He plays as a striker, but he has also been used as a winger on occasion.
Trent John Alexander-Arnold (born 7 October 1998) is an English professional footballer who plays as a right-back for Premier League club Liverpool.
 He is an academy graduate of Liverpool and made his senior debut for the club in 2016, aged 18.
 The following year, he won the club's Young Player of the Season award.
 He has also represented England at all youth levels from under-16 through to under-19.
 Due to the length of his name, his surname is shortened to Alexander for Premier League fixtures.
Alexander Mark David Oxlade-Chamberlain (born 15 August 1993) is an English professional footballer who plays as a midfielder for Premier League club Liverpool and the England national team.
Charles Joseph John "Joe" Hart (born 19 April 1987) is an English professional footballer who plays as a goalkeeper for West Ham United, on loan from fellow Premier League club Manchester City, and the England national team.
 With over 100 Premier League clean sheets, Hart holds the joint record for the most Premier League Golden Glove awards (four) and has amassed 73 international caps since his debut in 2008.
Nathaniel Edwin Clyne (born 5 April 1991) is an English professional footballer who plays as a right back for Premier League club Liverpool and the England national team.
Jessica Anne "Jess" Clarke (born 5 May 1989) is an English footballer who plays as a winger or forward for FA WSL club Liverpool and the England national team.
 After beginning her career with hometown team Leeds United (known as Leeds Carnegie between 2008 and 2010), Clarke joined Lincoln Ladies in 2010 and remained with the club when it re-branded as Notts County four years later.
 After six seasons at Notts County, Clarke signed for league rivals Liverpool in April 2017.
 Since making her senior England debut in 2009, Clarke has won over 40 caps.
 She has represented her country at two editions of the UEFA Women's Championship and at the 2011 FIFA Women's World Cup.
Jordan Brian Henderson (born 17 June 1990) is an English professional footballer who captains Premier League club Liverpool and plays for the England national team.
 He is usually deployed as a central midfielder for both club and country.
Jim Cassell is a former Youth Academy Director at Manchester City.
 He has been responsible for the development of players such as Shaun Wright-Phillips, Joey Barton, Stephen Ireland, Nedum Onuoha, Daniel Sturridge, Michael Johnson and Micah Richards and many others.