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A second study in the same journal finds that injuries among Rugby union players have nearly doubled since the sport became professional five years ago , from 27 % to 47 % .
 organization: Rugby union; person: Rugby union players
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: Rugby union; person: Rugby union players