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Van der Jagt was a member of the provincial parliament of Gelderland from 1974 to 1977 , Party chair of the Reformed Political League ( Gereformeerd Politiek Verbond ) from 1976 to 1984 , and a Senator from 1977 to 1981 , and also from 1983 to 1991 .
 der Jagt, Gelderland, Reformed Political League
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 der Jagt, Gelderland, Reformed Political League