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A " document type definition " ( " DTD " ) is a set of " markup declarations " that define a " document type " for an SGML-family markup language ( GML , SGML , XML , HTML ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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