Question: Prince Alexander von Fürstenberg's parents got divorced in what year?

Context articles: Eos (yacht)
Diane von Fürstenberg
Talita von Fürstenberg
Prince Egon von Fürstenberg
Tessa Souter
Mary Victoria Douglas-Hamilton
Prince Alexander von Fürstenberg
The DVF Awards
Alexandra von Fürstenberg
IBZ Berlin

The Eos is a three-masted Bermuda rigged schooner.
 The ship is one of the largest private sailing yachts in the world, and as of 2009 was owned by movie and media billionaire Barry Diller, husband of fashion designer Diane von Fürstenberg.
 According to a 2007 article in Harper's Bazaar, "Eos" features a figurehead of von Fürstenberg sculpted by Anh Duong.
 Its overall length measures approximately 305 feet (92.92m).
Diane von Fürstenberg, formerly Princess Diane of Fürstenberg (German: "Diane Prinzessin zu Fürstenberg" ; born Diane Simone Michelle Halfin; December 31, 1946) is a Belgian-American fashion designer best known for her iconic wrap dress.
 She initially rose to prominence when she married into the German princely House of Fürstenberg, as the wife of Prince Egon von Fürstenberg.
 Following their separation in 1973 and subsequent divorce in 1983, she has continued to use his family name.
Princess Talita Natasha von Fürstenberg (born Talita Natasha Prinzessin zu Fürstenberg on May 7, 1999) is an American-born socialite and fashion model.
 She is the granddaughter of fashion designers Diane von Fürstenberg and Prince Egon von Fürstenberg.
Prince Egon von Fürstenberg (Eduard Egon Peter Paul Giovanni Prinz zu Fürstenberg, Prinz Egon zu Fürstenberg, 29 June 1946 – 11 June 2004) was a socialite, banker, fashion and interior designer, and member of the German, aristocratic family Fürstenberg.
Tessa Souter was born in London to a Trinidadian father and an English mother.
 When she was eight, she took lessons in piano and voice.
 At twelve, she taught herself how to play guitar, and she performed for her friends.
 She left home when she was sixteen, got married, had a child, and then got divorced.
 She attended college while a neighbor babysat her child.
 After college, she worked as an editorial assistant and copy editor at "Parents" magazine, then became a freelance writer.
 She married a second time and divorced.
Lady Mary Victoria Douglas-Hamilton, also known as the Lady Mary Victoria Hamilton (11 December 185014 May 1922) was the Lanarkshire-born, Scottish great-grandmother of Prince Rainier III of Monaco, the fashion designer Prince Egon von Fürstenberg, the socialite and actress Princess Ira von Fürstenberg and the Czech Minister of Foreign Affairs Prince Karel Schwarzenberg.
 She was the daughter of William Alexander Anthony Archibald Hamilton, 11th Duke of Hamilton and of his wife, Princess Marie Amelie Elizabeth Caroline of Baden.
 Through her maternal grandmother, she was a third cousin of Emperor Napoléon III of France.
 She was a first cousin of Queen Carola of Saxony, Queen Stephanie of Portugal, King Carol I of Romania, and Princess Marie, Countess of Flanders (mother of King Albert I of the Belgians).
Prince Alexander von Fürstenberg (born Alexandre Egon Prinz zu Fürstenberg, January 25, 1970) is the son of fashion designers Diane von Fürstenberg and Prince Egon von Fürstenberg.
The DVF Awards, supported by The Diller-von Furstenberg Family Foundation, are given annually to provide recipients with the exposure and resources necessary to extend their efforts on behalf of women all over the world.
 The DVF Awards were conceived by Diane von Furstenberg in 2010 with the goal of honoring women who have displayed leadership, strength, and courage in their commitment to their causes.
 Every year, each Honoree receives a $50,000 grant from the Foundation to further their work.
 The inaugural DVF Awards were presented on March 13, 2010 at a ceremony hosted by Diane von Fürstenberg and Tina Brown at the United Nations on the closing night of The Women in the World Summit.
Alexandra von Fürstenberg (née Alexandra Natasha Miller, formerly Princess Alexandra von Fürstenberg, born October 3, 1972) is a furniture designer and the image director for DvF, the clothing label which was founded by her former mother in law, Diane von Fürstenberg, and helped revive the company’s famous 1970s wrap dress.
The Internationale Begegnungszentrum der Wissenschaft (International Meeting Centre of Science - IBZ Berlin) is a residential building for both, international scientists at the Free University of Berlin and the Max Planck Society and fellows of the Alexander von Humboldt Foundation.
 It is located at the Wiesbadener Straße in Berlin Wilmersdorf.
 The IBZ Berlin is a founding member of the Network of the Internationale Begegnungszentren der Wissenschaft, an association of international guesthouses (IBZs) and university-related guesthouses in Germany.
 The 25 million Marks (roughly 23 million Euros at purchase power parity) used to fund the IBZ, have been generously provided by the Alexander von Humboldt Foundation, the Volkswagen Foundation and the Land Berlin.
 Between 2010 and 2011 the building was renovated with the financial support of the Federal Ministry of Education and Research, and the Alexander von Humboldt Foundation.