Question: Orlando Trustfull was brought in by this Dutch former footballer born in what year

Context paragraphs:
Sarina Wiegman: Sarina Wiegman (born 26 October 1969), also known as Sarina Wiegman-Glotzbach, is a Dutch former footballer and current head coach of the Netherlands women's national football team.  She played as a central midfielder and, later in her career, as a defender.  In 2001, she became the first Dutch footballer to gain 100 caps.

Bram Wiertz: Bram Wiertz (born 21 November 1919) is a Dutch former footballer who competed in the 1952 Summer Olympics.  As of November 2012, Wiertz is the oldest Dutch international footballer still alive.

Gijs Luirink: Gijs Luirink (] , born 12 September 1983 in Amsterdam) is a Dutch former footballer who played as a centre back.  He is a former Dutch under-21 international.

Liesbeth Migchelsen: Liesbeth Migchelsen (born 11 March 1971, Harderwijk) is a Dutch former footballer who represented the Netherlands women's national team 95 times between 1990 and 2008.  She is the brother of former footballer .

Rogier Meijer: Rogier Meijer (born 5 September 1981 in Doetinchem) is a Dutch former footballer, who played his whole professional career for Dutch side De Graafschap as a midfielder.  In May 2014, Meijer announced his retirement from professional football.  After a year at his former amateur team VIOD, Meijer completely stopped playing football.  He is now working as a salesman at Pall Corporation in New York.

Jordi Cruyff: Johan Jordi Cruijff (] , anglicised to Cruyff; born 9 February 1974) is a Dutch former footballer.  Cruyff is currently Maccabi Tel Aviv's manager.  He is the son of Dutch former player and manager Johan Cruyff.

Frank de Boer: Franciscus "Frank" de Boer (] ; born 15 May 1970) is a Dutch former footballer and manager.

Gus Uhlenbeek: Gustav Reinier Uhlenbeek (born August 1970) is a Dutch former footballer.  He was born in Paramaribo in the former Dutch colony Suriname, but grew up in Amsterdam.  Uhlenbeek spent more than a decade in English football, and was released by Halifax Town at the end of the 2006–07 season.

Orlando Trustfull: Orlando Trustfull (born 4 August 1970 in Amsterdam) is a Dutch football manager and a former professional player.  He was the assistant manager at Internazionale and was brought in by Frank de Boer.  As of the start of the 2017–18 season he joined de Boer as a member of the coaching staff at Crystal Palace.

Theo Janssen: Theo Janssen (born 27 July 1981) is a Dutch former footballer who played as a midfielder for various clubs in the Netherlands, including Vitesse Arnhem, Twente and Ajax, as well as on loan for Belgian club Genk.  He spent 10 years with Vitesse before joining Twente in 2008, where he helped them win the Eredivisie and qualify for the Champions League for the first time in their history.  After being named Dutch Footballer of the Year in 2011, he played a season with Ajax, before returning to Vitesse in August 2012.

Supporting paragraphs: Orlando Trustfull Frank de Boer
Answer: 1970