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The PDP was part of the larger coalition Union of the Democratic Centre ( UCD ) which formed the Spanish government from 1977 to 1982 .
 organization: Union of the Democratic Centre
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:
 organization: Union of the Democratic Centre