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The Island of Ireland Peace Park and its surrounding park ( ) , 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 .
 Messines, Ypres, Flanders, Belgium
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Messines, Ypres, Flanders, Belgium