Question: During what war was the father of the Princess who was married to two men, one being a London based Dutch artist?

Context paragraphs:
E.H. Roelfzema: E.H. Roelfzema is the pen name of Erik Hazelhoff Roelfzema Jr. (February 17, 1947, The Hague - February 11, 2010, Kockengen), Dutch artist, writer, poet, lyricist and musician.  In his art he used encaustic techniques, as well as polymer resin (glass panels), and monomer resin (embeddings).  He travelled extensively, and from 1970 until 1990 he lived in Ahualoa, Hawaii, working as a farmer and fisherman, and surfing.  He returned to the Netherlands in 1990 and married photographer Patricia Steur.  His father was writer of the book "Soldier of Orange", which was made into a film directed by Paul Verhoeven and starring Rutger Hauer.  Musical collaborations include those with Roll, and Pizza Delivery Boys.  Dutch rock band Golden Earring recorded numerous lyrics by E.H. Roelfzema, including the band's signature tunes: "The Naked Truth".

Lee Jinjoon: Jinjoon Lee (이진준 born in Masan, South Korea) is a London based Korean artist and a designer working in a wide range of media, including sculpture, drawings, photo, video, sound and installation, to explore the perception of utopian ideologies.  After graduating from Seoul National University in Seoul, he went on to study moving image and lighting installation at the Royal College of Art in London, and the Ruskin School of Fine Art, University of Oxford.  Since giving his debut solo exhibition at ARKO Art Centre of Arts Council Korea in 2008, Lee has exhibited at numerous venues worldwide including Seoul Metropolitan Museum, Korea National Museum, India International Centre, The Prague National Gallery in Czech, The National Museum of Bulgaria, Royal College of Art and Royal College of Music in London.  He is a full-fledged member of Royal British Society of Sculptors (RBS).  Lee’s studio is perhaps best known for the public media sculpture "They", which was permanently installed at Digital Media City ,Seoul in the 2010 ,and works on the architectural design and development of innovative projects for various requests around the world.

Glass Swords: Glass Swords is the debut studio album by Scottish producer Russell Whyte under his alias of Rustie, released by Warp in 2011.  The album was produced and recorded between 2008 and 2010 by Whyte, partially in his father's home in Glasgow, Scotland and partly in his own home in London, England.  The album contains vocal work from Whyte as well as London based producer Nightwave.  The final six months of the production sessions involved Whyte attempting to choose and edit which tracks he felt were worth releasing on the final version of "Glass Swords".

Cor Visser: Cor Visser (26 August 1903, Spaarndam, North Holland – 27 September 1982, Ipswich) was a Dutch artist who spent much of his life living in and around Suffolk in the United Kingdom.  He first sailed to England in 1937 where he became particularly associated with the River Orwell, painting numerous watercolours of the river and surrounding area.  During the Second World War he was appointed official war artist to the Dutch Royal Family, then living in exile in London, where he painted many culturally important portraits of members of the royal family as well as key exiled government officials and military officers.  A selection of his work is exhibited in the Rijksmuseum Amsterdam, the Victoria and Albert Museum and the National Portrait Gallery in London.  The Ipswich Borough Council's Museums and Galleries Collection also contains a large selection of his paintings.  He and his wife are buried in St Mary's Churchyard overlooking the River Orwell.

Prince Christoph of Hesse: Christoph Ernst August of Hesse (Frankfurt, 14 May 1901 – Apennine Mountains near Forlì, 7 October 1943) was the fifth son of Prince Frederick Charles of Hesse and Princess Margaret of Prussia.  He was a German SS officer killed accidentally during World War II.

Son of Your Father: "Son of Your Father" is a song by Elton John with lyrics by Bernie Taupin.  It is the fourth track on his third studio album, "Tumbleweed Connection".  The lyrics tell of an argument between two men (one blind) on "an East Virginia Farm."  After a while, their argument leads to death because the two men did not follow the golden rule as stated in the lyrics (but in different words).  It is the only song off "Tumbleweed Connection" John has never performed in concert.

Konstantinos Mavromichalis: Konstantinos Mavromichalis (Greek: Κωνσταντίνος Μαυρομιχάλης ; Mani, 1797 – Nauplio, 1831), brother of the Bey of Mani Petros Mavromichalis, was a commander of Maniot forces during the Greek War of Independence and the assassin of the first head of state of Greece, Ioannis Capodistrias.  Along with Demetrius Ypsilanti, he commanded the forces that saved Nauplio from Ibrahim Pasha of Egypt.  When two of his brothers, Tzanis Mavromichalis and Petros were captured by government forces under Capodistrias, Konstantinos and the old bey's son Georgios Mavromichalis decided to take revenge.  On 9 October [O.S. 27 September] 1831 , the two Maniots were waiting by the doors of the church St. Spyridonas.  The Governor of Greece recognised the two men and was worried.  But before he could do anything the two men attacked him.  Konstantinos shot the Governor through the head and his nephew stabbed Capodistrias through the heart.  As the Maniot was escaping, he was shot by one of Capodistrias' bodyguards and by General Fotomaras who had watched the murder scene from his home window.  Running half dead through the streets of Nauplio, Konstantinos was shot several times before he died.  The angry citizens of the city dragged his body and threw it off a cliff called the Arvanitis.  His nephew was captured alive and executed by a firing squad.

Big V: The Big V is a semi-professional basketball league in Victoria, Australia.  The league comprises 12 competitions, with its two main ones being the men's (SCM) and women's (SCW) State Championship divisions.  Below the SCM and SCW is: Division One Men (D1M), Division One Women (D1W), Division Two Men (D2M), and Division Two Women (D1W).  The remaining six competitions are youth divisions, with those being: Victorian Youth Championship Men (VYCM), Victorian Youth Championship Women (VYCW), Youth League One Men (YL1M), Youth League One Women (YL1W), Youth League Two Men (YL2M), and Youth League Two Women (YL2W).

Princess Christina Margarethe of Hesse: Princess Christina Margarethe of Hesse (German: "Prinzessin Christina Margarethe von Hessen" ; 10 January 1933 – 22 November 2011) was the eldest daughter of Prince Christoph of Hesse and Princess Sophie of Greece and Denmark.  From 1956 to 1962, she was married to Prince Andrew of Yugoslavia, with whom she had two children.  Her second marriage to Robert Floris van Eyck, a Dutch artist based in London, lasted from 1962 to 1986.

Two Men of the Desert: Two Men of the Desert (also known as Two Men on the Desert and Two Men in a Desert) was a 1913 American silent Western short film written and directed by D. W. Griffith.  Based on a story by Jack London, the film was shot on location in Death Valley.  "Two Men of the Desert" is now presumed lost.

Supporting paragraphs: Princess Christina Margarethe of Hesse Prince Christoph of Hesse
Answer: World War II