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He was a member of the Belgian federal parliament from 1978 to 2004 , first as a representative ( 1978 – 1999 ) and then as a senator ( 1999 – 2004 ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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