Question: What year was George Sellars fatally wounded at the Battle of Messines in West Flanders, Belgium?

Context articles: George Harold Baker
Ertebrekers
Hanapepe massacre
't Hof van Commerce
Messines Ridge (New Zealand) Memorial
East Flanders
Battle of Messines (1917)
Mines in the Battle of Messines (1917)
Island of Ireland Peace Park
George Sellars

George Harold Baker (November 4, 1877 in Sweetsburg, Quebec, Canada – June 2, 1916 in Ypres, West Flanders, Belgium) was a Canadian politician and lawyer.
 He was elected to the Canadian House of Commons in 1911 as a Member of the Conservative Party to represent the riding of Brome.
 He fought in World War I as a Lieutenant-Colonel with the 13th Scottish Light Dragoons (1913–1914) and commanded the 5th Canadian Mounted Rifles which he led into action in France in July 1915.
 He was killed in action at Ypres, West Flanders, Belgium on June 2, 1916.
 His father was senator and MP George Barnard Baker.
Ertebrekers is a Belgian band from the province West Flanders in Flanders, the Dutch-speaking part of Belgium.
 The band name means 'heart breakers' in their local dialect.
 Their lyrics are in West Flemish, the Dutch dialect of the province of West Flanders, and their style has been described as a mixture of rap, groove, white soul and hiphop.
 The band is composed of Flip Kowlier, Peter Lesage and Jeffrey Bearelle.
The Hanapēpē Massacre (also called the Battle of Hanapēpē since both sides were armed) happened on September 9, 1924.
 Toward the end of a long-lasting strike of Filipino sugar workers on Kauaʻ i, Hawaiʻ i, local police shot dead nine strikers and fatally wounded seven, strikers shot and stabbed three sheriffs to death and fatally wounded one; a total of 20 people died.
 The massacre brought an end to armed protests in Hawaii.
't Hof van Commerce is a Belgian hip hop crew from Izegem in the province West Flanders in Flanders, the Dutch-speaking part of Belgium.
 Their name means 'commercial court' in their local dialect.
 Almost all their raps/lyrics are in West Flemish, the Dutch dialect of the province of West Flanders, with the exception of some lines sung in Limburgish by DJ 4T4 or a mix between those two dialects.
The Messines Ridge (New Zealand) Memorial is a World War I memorial, located in Messines Ridge British Cemetery, near the town of Mesen, Belgium.
 The memorial lists 827 officers and men of the New Zealand Expeditionary Force with no known grave who died in or near Messines in 1917 and 1918.
 This period included the Battle of Messines.
East Flanders (Dutch: "Oost-Vlaanderen" ] , French: "(Province de) Flandre-Orientale" , German: "Ostflandern" ) is a province of Flanders, one of the three regions of Belgium.
 It borders (clockwise from the North) on Zeelandic Flanders (the Netherlands) and (in Belgium) on the provinces of Antwerp, Flemish Brabant (both in Flanders), of Hainaut (Wallonia) and of West Flanders (Flanders).
 It has an area of 2,991 km² which is divided into six administrative districts ("arrondissementen" in Dutch) containing 65 municipalities.
 The provincial population is 1,408,484 and the capital is Ghent.
The Battle of Messines (7–14 June 1917) was conducted by the British Second Army (General Sir Herbert Plumer), on the Western Front near the village of Messines in West Flanders, Belgium, during the First World War.
 The Nivelle Offensive in April and May had failed to achieve its more ambitious aims, had led to the demoralisation of French troops and dislocated the Anglo-French strategy for 1917.
 The offensive at Messines forced the Germans to move reserves to Flanders from the Arras and Aisne fronts, which relieved pressure on the French.
 The tactical objective of the attack at Messines was to capture the German defences on the ridge, which ran from Ploegsteert (Plugstreet) Wood in the south, through Messines and Wytschaete to Mt. Sorrel, to deprive the German 4th Army of the high ground south of Ypres.
 The ridge commanded the British defences and back areas further north, from which the British intended to conduct the Northern Operation, an advance to Passchendaele Ridge and then capture the Belgian coast up to the Dutch frontier.
The mines in the Battle of Messines comprised a series of underground explosive charges, secretly planted by British tunnelling units beneath the German 4th Army lines near the village of Mesen ("Messines" in French, historically used in English) in Belgian West Flanders during the First World War.
 The mines were detonated at the start of the Battle of Messines (7–14 June 1917) , creating 19 large craters.
 The joint explosion of the mines at Messines ranks among the largest non-nuclear explosions of all time.
 The evening before the attack, General Sir Charles Harington, Chief of Staff of the Second Army (General Sir Herbert Plumer), remarked to the press, "Gentlemen, we may not make history tomorrow, but we shall certainly change the geography".
 The Battle of Messines marked the zenith of mine warfare.
 On 10 August 1917, the Royal Engineers fired the last British deep mine of the war, at Givenchy-en-Gohelle near Arras.
The Island of Ireland Peace Park and its surrounding park (Irish: "Páirc Síochána d'Oileán na hÉireann" ), also called the Irish Peace Park or Irish Peace Tower in Messines, near Ypres in Flanders, Belgium, is a war memorial to the soldiers of the island of Ireland who died, were wounded or are missing from World War I, during Ireland's involvement in the conflict.
 The tower memorial is close to the site of the June 1917 battle for the Messines Ridge.
George Maurice Victor Sellars (16 April 18867 June 1917) was a rugby union player who represented New Zealand fifteen times, including two Test matches.
 He played club rugby for Ponsonby, and was first selected for Auckland in 1910, and in 1912 gained international selection for New Zealand Māori.
 Sellars was selected for the All Blacksas New Zealand's international team is knownfor their 1913 tour of North America where he played fourteen matches.
 As well, he was also in the All Blacks' side that played Australia immediately prior to their tour.
 Although unavailable to play for New Zealand the following year, he did represent the Māori again that season.
 In 1915 Sellars enlisted for service in the First War War, and he was fatally wounded in 1917 at the Battle of Messines.