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regulators and research firms promise that the $ 1 . 5 billion settlement would be finalized two months ago .
 organization: research firms; person: regulators
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 organization: research firms; person: regulators