question: Who is Donnchadh Iv, Earl Of Fife's father-in-law?
context: [["Peter Burroughs", ["Peter Burroughs( born 27 January 1947) is a British television and film actor, the director of Willow Management.", "He is the father- in- law of actor and TV presenter Warwick Davis."]], ["Patrick IV, Earl of March", ["Patrick IV, Earl of March( 124210 October 1308), sometimes called Patrick de Dunbar\" 8th\" Earl of March, was the most important magnate in the border regions of Scotland.", "He was one of the Competitors for the Crown of Scotland."]], ["Mary de Monthermer", ["Mary MacDuff, Countess of Fife (\"n\u00e9e\" de Monthermer; October 1297 \u2013 circa 1371) was an English noblewoman.", "She was a daughter of Ralph de Monthermer, 1st Baron Monthermer and his wife Joan of Acre.", "Other sources have her being born in 1298."]], ["Donnchadh IV, Earl of Fife", ["Donnchadh IV, Earl of Fife", "[Duncan IV] (1289\u20131353) was sometime Guardian of Scotland, and ruled Fife until his death.", "He was the last of the native Scottish rulers of that province.", "He was born in late 1289, the same year as his father Donnchadh III's murder.", "He therefore came into the Mormaerdom as a baby.", "He was so young that the honour of crowning John Balliol \u2013 normally the hereditary right of the Mormaer of Fife \u2013 was delegated to a knight, namely Sir John de St. John.", "He also missed the crowning of Robert I, owing to his captivity in England.", "Robert was forced to call upon Donnchadh's sister, Isabella, to officiate in his absence.", "His initial support for Robert has been doubted, but in 1315, a year after the Battle of Bannockburn, he resigned his Mormaerdom to King Robert for a regrant.", "The agreement with Robert ensured that the Mormaerdom would not be held by the king, and that the arms of Fife should always be unique from the similar royal arms.", "If Donnchadh were to die childless, King Robert would grant it to someone, by default Alan of Menteith.", "This was because Donnchadh's wife was in the custody of the English, and there was obviously some pressure from the men of Fife to retain their own regional ruler.", "He was present at the negotiations which led to the Treaty of Edinburgh, and a signatory to the Declaration of Arbroath.", "The Earl of Fife fought with the Bruce loyalists at the Battle of Dupplin Moor", "where, he being made prisoner, changed sides and, with William Sinclair, Bishop of Dunkeld, a great adherent of Robert the Bruce, crowned Edward Balliol King of Scots at Scone on 24 September 1332.", "The following year, on 19 July 1333, he fought with the Scottish army at the Battle of Halidon Hill, when he was again captured.", "In 1306, Donnchadh married Mary de Monthermer, a granddaughter of Edward I of England.", "He died with no male heirs.", "He is important because he was the last male Gaelic ruler of Fife.", "When he died in 1353, he was succeeded in his mormaerdom by his daughter Isabella, who married four times:", "Isabella signed the Earldom of Fife over to Robert Stewart, 1st Duke of Albany in 1371."]], ["Robert Bruce, Lord of Liddesdale", ["Sir Robert Bruce, Lord of Liddesdale( died 11 August 1332) was an illegitimate son of King Robert the Bruce and an unknown mother.", "He was knighted and awarded the royal arms at the Battle of Bannockburn.", "His father made him Lord of Liddesdale after William II de Soules was found guilty of treason at the Black Parliament of 1320.", "It has been suggested that he may have been the father of Thomas Bruce, 1st Baron of Clackmannan, but there is no clear evidence for this.", "Faced with Edward Balliol's invasion of Scotland, he and Donnchadh IV, Earl of Fife carried out an unsuccessful attempt on 6 August 1332 to repel the landing at Kinghorn in Fife.", "He then quarrelled with the regent, Donald II, Earl of Mar.", "He was killed leading a charge at the Battle of Dupplin Moor on 11 August 1332."]], ["David Carnegie, 4th Duke of Fife", ["David Charles Carnegie, 4th Duke of Fife( born 3 March 1961) is a Scottish peer.", "He is the only son of the late James Carnegie, 3rd Duke of Fife, and his former wife Caroline Dewar.", "He was styled Earl of Macduff until 1992, and then Earl of Southesk until succeeding his father on 22 June 2015 as the fourth Duke of Fife and Chief of the Clan Carnegie.", "As a great- great- grandson of Edward VII, he is in the line of succession to the British throne.", "He is also the second cousin once removed of Queen Elizabeth II."]], ["Ludwig von Westphalen", ["Johann Ludwig von Westphalen( 11 July 1770 \u2013 3 March 1842) was a liberal Prussian civil servant and the father- in- law of Karl Marx."]], ["Barthold A. Butensch\u00f8n Sr.", ["Hans Barthold Andresen Butensch\u00f8n( 27 December 1877 \u2013 28 November 1971) was a Norwegian businessperson.", "He was born in Kristiania as a son of Nils August Andresen Butensch\u00f8n and Hanna Butensch\u00f8n, and grandson of Nicolay Andresen.", "Together with Mabel Anette Plahte( 1877 \u2013 1973, a daughter of Frithjof M. Plahte) he had the son Hans Barthold Andresen Butensch\u00f8n Jr. and was through him the father- in- law of Ragnhild Butensch\u00f8n and grandfather of Peter Butensch\u00f8n.", "Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.", "He took commerce school and agricultural school.", "He was hired in the family company N. A. Andresen& Co, and became a co-owner in 1910.", "He eventually became chief executive officer.", "The bank changed its name to Andresens Bank in 1913 and merged with Bergens Kreditbank in 1920.", "The merger was dissolved later in the 1920s.", "He was also a landowner, owning Nedre Sk\u00f8yen farm and a lot of land in Enebakk.", "He chaired the board of Nydalens Compagnie from 1926, having not been a board member before that.", "He also chaired the supervisory council of Forsikringsselskapet Viking and Nedre Glommen salgsforening, and was a supervisory council member of Filharmonisk Selskap.", "He was a member of the gentlemen's club SK Fram since 1890, and was proclaimed a lifetime member in 1964.", "He was buried in Enebakk."]], ["Ogawa Mataji", ["Viscount was a general in the early Imperial Japanese Army.", "He was also the father- in- law of Field Marshal Gen Sugiyama."]], ["John Adams (merchant)", ["John Adams( 1672 or 1673 \u2013 1745) was an American- born Canadian merchant and member of the Nova Scotia Council.", "He was the father- in- law of Henry Newton( politician)."]]]
supporting_facts: [["Donnchadh IV, Earl of Fife", 16], ["Mary de Monthermer", 1]]
evidences: [["Donnchadh IV, Earl of Fife", "spouse", "Mary de Monthermer"], ["Mary de Monthermer", "father", "Ralph de Monthermer"]]
answer: Ralph de Monthermer