Question: Which Ajax player that competed in the 1986-87 European Cup later became the assistant manager for Ajax? 

full_context: Document 1: AFC Ajax in European football: AFC Ajax is one of the most successful football clubs in Europe. There are only three clubs in the history of the game to have won the European Cup/Champions League titles (won four times by Ajax) three times consecutively. Only Real Madrid and Bayern Munich have achieved this feat aside from Ajax. Furthermore, Ajax have won the UEFA Cup Winners' Cup once, the UEFA Cup once, the UEFA Super Cup three times, the Intercontinental Cup twice and the International Football Cup once. The club has also appeared in three additional finals finishing as runners-up. In the 1979–80 season, Ajax player Søren Lerby was top scorer of the European Cup with 10 goals. Below is a list of all official European matches contested by Ajax.
Document 2: 1987 European Cup Winners' Cup Final: The 1987 European Cup Winners' Cup Final was a football match contested between Ajax of Netherlands and Lokomotive Leipzig of East Germany. It was the final match of the 1986–87 European Cup Winners' Cup and the 27th European Cup Winners' Cup Final. The final was held at Olympic Stadium in Athens, Greece. Ajax won the match 1–0 with a 20th-minute header from Marco van Basten.
Document 3: Arjen Robben: Arjen Robben (] ; born 23 January 1984) is a Dutch professional footballer who plays for German club Bayern Munich and is the captain of the Netherlands national team. He is a forward who usually plays as a left or right sided winger, known for his dribbling skills, speed, crossing ability and his accurate left foot long-range shots from the right wing.
Document 4: Dennis Bergkamp: Dennis Nicolaas Maria Bergkamp (] ; born 10 May 1969) is a former Dutch professional footballer, who is the assistant manager at Ajax. Originally a wide midfielder, Bergkamp was moved to main striker and then to second striker, where he remained throughout his playing career. Bergkamp has been described by Jan Mulder as having "the finest technique" of any Dutch international and a "dream for a striker" by teammate Thierry Henry.
Document 5: Martin Jol: Maarten Cornelis "Martin" Jol (born 16 January 1956) is a Dutch football manager and former midfielder.
Document 6: 1995 UEFA Champions League Final: The 1995 UEFA Champions League Final was the 40th edition and took place in Vienna between AFC Ajax and A.C. Milan. It was Milan's third consecutive European Cup final, a feat which has only been matched in the Champions League era by Juventus between 1996 and 1998, and they were aiming to tie Real Madrid's record of having won the European Cup six times. After 85 minutes the deadlock was broken when Frank Rijkaard, a former Milan player found Patrick Kluivert with just enough space in the penalty area to lose his two markers and slot the ball past Milan keeper Sebastiano Rossi.
Document 7: Klaas-Jan Huntelaar: Dirk Jan Klaas "Klaas-Jan" Huntelaar (] ; born 12 August 1983), nicknamed "The Hunter", is a Dutch professional footballer who plays as a striker for Ajax and the Netherlands national team.
Document 8: Jeremain Lens: Jeremain Marciano Lens (born 24 November 1987) is a Dutch footballer who plays for Turkish club Beşiktaş and the Netherlands national team. He is a versatile attacking player, known for his pace and stamina, primarily being used as a winger or a striker, but he can successfully play as a second striker.
Document 9: Edwin van der Sar: Edwin van der Sar OON (] ) (born 29 October 1970) is a Dutch former professional footballer who played as a goalkeeper. During his career he played for Ajax, Juventus, Fulham and Manchester United. He is the second most capped player in the Netherlands national team's history. He currently works as the chief executive officer at Ajax. He came out of retirement to play for Dutch amateur team VV Noordwijk.
Document 10: 1994–95 AFC Ajax season: During the 1994–95 Dutch football season, AFC Ajax competed in the Eredivisie. Ajax won a league-cup double. They won their 25th Dutch title in style, not losing a single match all season and scoring 106 goals. Ajax also won their fourth European Cup, defeating A.C. Milan 1-0 in the final. This Ajax squad is considered to be one of the best teams in football history.
Document 11: 1973 European Cup Final: The 1973 European Cup Final was a football match held at the Red Star Stadium, Belgrade, on 30 May 1973, in which Ajax of the Netherlands defeated Juventus of Italy 1–0. A goal from Johnny Rep four minutes into the match was enough for Ajax to claim their third consecutive European Cup. This victory meant that Ajax had earned the privilege of keeping the trophy permanently. Juventus, however, got revenge 23 years later beating Ajax in the 1996 final in Rome.
Document 12: Marc Overmars: Marc Overmars (] , born 29 March 1973) is a Dutch former footballer and the current director of football at Ajax. During his footballing career, he played as a winger and was renowned for his speed and technical skills.
Document 13: 1986–87 European Cup Winners' Cup: The 1986–87 season of the European Cup Winners' Cup was won by Ajax in the final against Lokomotive Leipzig. The young Ajax side, which included the likes of Marco van Basten, Frank Rijkaard and Dennis Bergkamp, was guided to victory by its coach Johan Cruyff. It was Ajax's only title in the competition, and was added to a hat-trick of European Cup wins from 1971 to 1973. They also went on to win another European Cup and a UEFA Cup in the 1990s.
Document 14: Urby Emanuelson: Urby Vitorrio Diego Emanuelson (born 16 June 1986) is a Dutch professional footballer of Surinamese descent who plays for Eredivisie side FC Utrecht and the Netherlands national team. As a product of the Ajax Youth Academy, he spent most of his career at Ajax playing as a left wing-back, before being played more as a left midfielder or left winger by manager Martin Jol. After his move to Milan, his then-manager Massimiliano Allegri played Emanuelson also as an attacking midfielder, midfielder and right winger.
Document 15: 1989–90 A.C. Milan season: A.C. Milan won their second consecutive European Cup, thanks to a final victory over Benfica. The Dutch trio of Marco van Basten, Ruud Gullit and Frank Rijkaard was now a firmly established unit, but their efforts were not quite enough to defeat Napoli in the title chase.
ground_truth: Dennis Bergkamp