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International trade union leaders on Friday expressed outrage that the head of the International Labour Organisation ( ILO ) had been barred from speaking at next week 's WTO meeting in Singapore .
 organization: WTO; organization: International Labour Organisation; location: Singapore; organization: ILO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 organization: WTO; organization: International Labour Organisation; location: Singapore; organization: ILO