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The current procurement program of new-built aircraft as well as refurbishment and upgrade of 60 used and serving aircraft is expected to be complete by 2010 – 2012 , as per the Pakistan Air Force Air Chief Marshal Tanvir Mahmood Ahmed .
 organization: Pakistan Air Force; person: Tanvir Mahmood Ahmed
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Pakistan Air Force, Tanvir Mahmood Ahmed 
Answer:
 organization: Pakistan Air Force; person: Tanvir Mahmood Ahmed