Question: What is the nickname of the man who managed West Ham United immediately before Slaven Bilić ?

full_context: Document 1: 2017–18 Crystal Palace F.C. season: The 2017–18 season is Crystal Palace's fifth consecutive season in the Premier League (their longest ever spell in the top division of English football) and their 112th year in their history. This season, Crystal Palace participates in the Premier League, FA Cup and EFL Cup. Frank de Boer was appointed as manager of Palace before the season began, only to be sacked on 11 September 2017 after losing his first four Premier League games without scoring. Former England national team manager Roy Hodgson was confirmed to be his replacement the next day.
Document 2: 2010–11 Crystal Palace F.C. season: The Crystal Palace F.C. season 2010-11 was Crystal Palace's sixth consecutive season in the Championship. The previous season had seen Palace finish one place above the relegation zone, having been deducted ten points for going into administration. The CPFC 2010 consortium completed a takeover of the club in the close season and installed former Scotland manager George Burley as the club's new boss, with club legend Dougie Freedman continuing his role as assistant manager. However, after a poor start to the season, Burley was sacked on New Year's Day and Freedman named manager the following week. Under Freedman fortunes improved, and the club secured another season at Championship level shortly before the conclusion of the campaign.
Document 3: List of Wolverhampton Wanderers F.C. managers: The following is a list of Wolverhampton Wanderers managers from the founding of Wolverhampton Wanderers Football Club in 1877 until the present. The club has been served by 29 different permanently appointed managers, all of them born in the United Kingdom, aside from the short reigns of Norwegian Ståle Solbakken (2012–13) and Italian Walter Zenga (2016).
Document 4: Jimmy Floyd Hasselbaink: Jerrel "Jimmy" Floyd Hasselbaink (born 27 March 1972) is a Dutch former professional footballer and current manager of EFL League One club Northampton Town.
Document 5: Slaven Bilić: Slaven Bilić (; born 11 September 1968) is a retired Croatian professional footballer and current manager of Premier League club West Ham United.
Document 6: Sean Dyche: Sean Mark Dyche ( ; born 28 June 1971) is an English former professional footballer, who is currently the manager of Premier League side Burnley, a position he has held since October 2012. During his playing career, Dyche played as a centre-back, making his professional debut in 1990 and representing Chesterfield - whom he captained and scored for in an FA Cup semi-final - Bristol City, Luton Town, Millwall, Watford and Northampton Town. He was promoted with four of his six clubs. After retiring as a player in 2007 he coached at Watford, including a stint as manager between June 2011 and July 2012.
Document 7: 2007–08 Fulham F.C. season: The 2007–08 season was Fulham F.C.'s seventh consecutive season in the Premier League. Lawrie Sanchez was in charge of the club for the first few months of the season after taking charge at the end of the previous campaign, but left the club by mutual consent in December 2007 after a string of poor results had sent Fulham sliding towards the relegation zone. He was replaced by ex-Finland national team coach Roy Hodgson, who had previously been in charge of fellow Premier League side Blackburn Rovers amongst many other clubs around Europe. Fulham managed to save themselves from relegation to the Championship with a 1–0 away win against Portsmouth at Fratton Park, their third-straight away victory, despite wins for relegation rivals Reading and Birmingham City, staying up on goal difference.
Document 8: Tony Carr: Anthony Carr MBE (born 5 September 1950) is an English sports coach and former Director of Youth Development at the West Ham United football club's youth academy and is recognised as one of the most influential figures in English football. A former graduate of the academy himself, whose footballing career was cut short by injury, he joined the club's staff as a youth coach in 1973. Since then in his tenure as director, as of 2010, Carr is credited with producing talent which has earned an estimated £80 million in transfer fees for the club, while the 23-man England squad for the 2010 FIFA World Cup contained no less than seven players trained by Carr – Rio Ferdinand, Frank Lampard, Joe Cole, Michael Carrick, Jermain Defoe, Glen Johnson and John Terry.
Document 9: List of East Stirlingshire F.C. managers: This chronological list of managers of East Stirlingshire Football Club comprises all those who have held the position of manager of the first team of East Stirlingshire F.C. since the position was created in 1966. The club's first ever manager was Lawrence Binnie in 1966, prior to then all management roles were assigned to the board of directors at the club. Sir Alex Ferguson's first ever managerial job was with East Stirlingshire. He managed the club during 1974 before moving to St Mirren. No manager has ever won a league title with the club, however, Billy Lamont managed the club to a runners-up spot in the 1979–80 Scottish Second Division. To date, every person to have managed the club has been from Scotland.
Document 10: Roy Hodgson: Roy Hodgson ( ; born 9 August 1947) is an English football manager and former player, currently managing Premier League club Crystal Palace.
Document 11: Caretaker manager: In association footballing terms, a caretaker manager is somebody who takes temporary charge of the management of a football club, usually when the regular manager is dismissed, or leaves for a different club. However, a caretaker may also be appointed if the regular manager is suspended, ill or unable to attend to their usual duties. Caretaker managers are normally appointed at short notice from within the club, usually the assistant manager, a senior coach, or an experienced player. In other sports, the term "interim manager" is more commonly used.
Document 12: Gareth Southgate: Gareth Southgate (born 3 September 1970) is an English football manager and former player who played as a defender or as a midfielder. He is currently the manager of the England national team. He won the League Cup with both Aston Villa and Middlesbrough (in 1995–96 and 2003–04 respectively, and as captain), and captained Crystal Palace to win the First Division championship in 1993–94. He also reached an FA Cup and UEFA Cup final as a player, and made 57 appearances for the England national team, featuring in the 1998 FIFA World Cup and both the 1996 and 2000 European Championships. His playing career ended in May 2006 at the age of 35, and after more than 500 league appearances, he was subsequently appointed Middlesbrough manager. He served as manager of Middlesbrough from June 2006 until October 2009, then managed the England U21 team from 2013 to 2016, before becoming the England national team manager in 2016.
Document 13: Sam Allardyce: Samuel Allardyce ( ; born 19 October 1954), known as "Big Sam", is an English football manager and former professional player, who most recently managed Crystal Palace from December 2016 to May 2017.
Document 14: West Ham United F.C. managers: London football team, West Ham United have had only fifteen permanent managers in their history and an additional three caretaker managers. Up until 1989 the club had only had five different managers. Before the appointment of Gianfranco Zola in 2008 the club never had an overseas manager, with the only non-Englishman being the Scot, Lou Macari. The current manager is Slaven Bilić who was appointed in June 2015. The most recent manager before that was Sam Allardyce who was appointed in May 2011 and left the club in May 2015. Numerous former West Ham players have taken on temporary managerial roles at the club, between permanent managers. Ronnie Boyce briefly took the reins, in February 1990, between Macari's resignation and the appointment of Billy Bonds. Former Hammer's player and board member Trevor Brooking was briefly in charge during two separate spells as caretaker manager in 2003, first during the illness of Glenn Roeder and again between Roeder's sacking and the appointment of Alan Pardew. Former player Kevin Keen has been caretaker manager twice; immediately prior to Gianfranco Zola's appointment in 2008 and after the sacking of Avram Grant in 2011.
Document 15: 2001–02 Hibernian F.C. season: Season 2001–02 was a turbulent one for Hibernian, as the team had three different permanent managers during the season. Alex McLeish left the club in December to manage Rangers; Hibs surprisingly replaced him with star player Franck Sauzée, who retired as a player when he was appointed manager. Sauzee's brief tenure saw a long winless run in the SPL and domestic cup defeats by Rangers and Ayr United. The winless run in the league dragged Hibs into the fringes of a relegation battle, and Sauzee was sacked after just 69 days in charge. Kilmarnock manager Bobby Williamson was hired as Sauzee's replacement, and a brief winning run averted any danger of relegation. Earlier in the season, Hibs had been knocked out of the UEFA Cup in the first round by AEK Athens, but only after a dramatic second leg at Easter Road that went to extra time.
ground_truth: "Big Sam"