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Through Web - based buying consortiums , through auctions and reverse auctions and various other types of e - marketplaces , companies are saving millions of dollars in the procurement of supplies and services .
 organization: Web - based buying consortiums; organization: companies
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 organization: Web - based buying consortiums; organization: companies