93998
During the 1960s he served as a Peace Corps volunteer in Nigeria , among the Yoruba .
 organization: Peace Corps; location: Nigeria
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: Peace Corps, Nigeria 
Answer:
 organization: Peace Corps; location: Nigeria