Question: What is the nickname of the man who managed West Ham United immediately before Slaven Bilić ?
Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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. [END] 
Answer: 
"Big Sam"
"Big Sam"