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In 1973 , he co-founded the Selsdon Group , which was opposed to the abandonment of the radical 1970 manifesto by Edward Heath .
 Selsdon Group, Edward Heath
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Selsdon Group, Edward Heath