Question: Who was the assistant coach for the 2014 FIFA World Cup winning team?

Context paragraphs:
Japan national football team in 2013: The Japan national football team in 2013, managed by head coach Alberto Zaccheroni, competed in the 2013 FIFA Confederations Cup, the 2013 EAFF East Asian Cup and the fourth round of the 2014 FIFA World Cup qualification, in amongst international friendly matches both at home and abroad, as they progress towards the 2014 FIFA World Cup.

2014 FIFA World Cup Final: The 2014 FIFA World Cup Final was a football match that took place on 13 July 2014 at the Maracanã Stadium in Rio de Janeiro, Brazil to determine the 2014 FIFA World Cup champion.  Germany defeated Argentina 1–0 in extra time, with the only goal being scored by Mario Götze, who collected André Schürrle's cross from the left on his chest before volleying a high left-footed shot into the net.  The match was the third final between the two countries, a World Cup record, after their 1986 and 1990 matches, and billed as the world's best player (Lionel Messi) versus the world's best team (Germany).

Japan national football team in 2011: The Japan national football team in 2011, managed by head coach Alberto Zaccheroni, began by competing and winning the 2011 AFC Asian Cup.  The win meant Japan were crowned the Champions of Asia for a record 4th time and earned a berth in the 2013 FIFA Confederations Cup.  The team would continue by competing in the 2011 Kirin Cup and the 2011 Copa América in amongst other international friendly matches before closing out 2011 by commencing in the third round of the 2014 FIFA World Cup qualification as they progress towards the 2014 FIFA World Cup.

2014 FIFA World Cup qualification – UEFA Group I: The 2014 FIFA World Cup qualification UEFA Group I was a UEFA qualifying group for the 2014 FIFA World Cup.  The group comprised 2010 FIFA World Cup winners Spain, along with France, Belarus, Georgia and Finland.

Joachim Löw: Joachim Löw (] ; born 3 February 1960) is a German football coach, and former player.  He is currently the head coach of the Germany national team, which he led to victory at the 2014 FIFA World Cup in Brazil and the 2017 FIFA Confederations Cup in Russia.

Hans-Dieter Flick: Hans-Dieter "Hansi" Flick (born 24 February 1965) is a German football manager and former player.  From August 2006 to July 2014, he was the assistant coach of the German national football team under head coach Joachim Löw.

Carlos Vera: Carlos Alfredo Vera Rodríguez (born June 25, 1976) is an Ecuadorian football referee.  He has been an international referee since 2006.  He has officiated matches in FIFA World Cup qualifiers, the Copa Libertadores, the Copa Sudamericana and the South American Youth Football Championship.  He was selected as a referee for the 2011 Copa América in Argentina and the 2015 Copa America in Chile.  In addition, he was appointed by FIFA to take charge of matches at the 2012 FIFA Club World Cup and the 2014 FIFA World Cup.  He was selected as the fourth official for the 2014 FIFA World Cup Final.

Bruno Conti: Bruno Conti (born 13 March 1955 in Nettuno, Rome) is an Italian football manager and former player.  He coached Serie A club Roma from 14 March 2005 to 30 June 2005; he is currently head of the club's youth sector.  Throughout his playing career, he was usually deployed as a winger, and also previously played for Roma, where he spent his entire club career, aside from two season-long loan spells with Genoa in the 70s.  He is considered by many in the sport to be one of the greatest Italian players of all time in his position.  Nicknamed "The Mayor of Rome", he was an important figure in the club's history, and won a league title as well as five Coppa Italia titles during his time in the Italian capital.  At international level, he was notably a member of Italy's 1982 FIFA World Cup winning team, and also took part at the 1986 FIFA World Cup.

Japan national football team in 2014: The Japan national football team in 2014, managed by head coach Alberto Zaccheroni, compete in the 2014 FIFA World Cup, in amongst international friendly matches both at home and abroad, as they progress towards the 2014 FIFA World Cup and 2015 AFC Asian Cup.  After the World Cup, Javier Aguirre had been appointed as the new head coach.

Bruno Vain: Bruno is currently one of the main anchors at where he led the network's coverage of Summer 2012 Olympics from London.  Such coverage included six 24-hour-a-day channels.  Bruno was also among main anchors & studio hosts for the network's coverage of 2014 FIFA World Cup from Brazil and basketball's 2014 FIBA Basketball World Cup from Spain.  Since joining DirecTV Sports in 2007, Bruno also hosted the network's coverage of FIFA World Cup 2010 from South Africa, FIBA World Cup 2010 from Turkey, Under 20 FIFA World Cup 2011 from Colombia, numerous NBA Finals, and 2011 FIBA Americas Championship from Argentina, among many others.

Supporting paragraphs: Hans-Dieter Flick Joachim Löw
Answer: Hans-Dieter "Hansi" Flick