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When the Nigerian Army invaded Biafra on July 6 , 1967 Ojukwu sent Banjo and General Albert Okonkwo to invade Nigeria .
 person: Ojukwu; person: Albert Okonkwo; location: Nigeria
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Ojukwu; person: Albert Okonkwo; location: Nigeria