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He is from a steeped footballing background as he is the son of former League of Ireland player Derek O'Brien , younger brother of fellow Drogheda United player Mark O'Brien and nephew of former Republic of Ireland internationals Ray and Fran .
 person: Derek O'Brien; organization: Drogheda United; person: Mark O'Brien; organization: Republic of Ireland; person: Ray; person: Fran
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Derek O'Brien, Drogheda United, Mark O'Brien, Republic of Ireland, Ray, Fran 
Answer:
 person: Derek O'Brien; organization: Drogheda United; person: Mark O'Brien; organization: Republic of Ireland; person: Ray; person: Fran