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Nwakanma has spoken at numerous conferences on Open Source and Free Software and other topics including O'Reilly 's OSCON , the Free and Open Source Developers European Meeting ( FOSDEM ) and Yale University 's Access to Knowledge Conference , the The Ghana-India Kofi Annan Centre of Excellence in ICT , The Open World Forum .
 person: Nwakanma; organization: Open Source; organization: Open Source; organization: Yale University; organization: Open
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: Nwakanma, Open Source, Open Source, Yale University, Open 
Answer:
 person: Nwakanma; organization: Open Source; organization: Open Source; organization: Yale University; organization: Open