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Ecoglasnost became a founding member of the umbrella opposition movement Union of Democratic Forces on 7 December 1989 , and gave rise to the Green Party of Bulgaria on 28 December 1989 , the Political Club of Ecoglasnost in March 1990 , and the National Movement of Ecoglasnost on 15 June 1991 .
 Union of Democratic Forces, Green Party of Bulgaria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Union of Democratic Forces, Green Party of Bulgaria