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James Jeans contributed the important suggestion that stellar matter would certainly be ionized , but that was the end of any collaboration between the pair , who became famous for their lively debates .
 person: James Jeans
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:
 person: James Jeans