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Cofer Black , formerly a high-ranking C.I.A. officer and now a senior executive with Blackwater USA , has publicly said that his company would be prepared to take on the Darfur account .
 person of company: Cofer Black, Blackwater USA
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Cofer Black, Blackwater USA 
Answer:
 person of company: Cofer Black, Blackwater USA