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All 175 turbines of phase 1 were confirmed fully operational on 8 April 2013 , and the wind farm was formally inaugurated by the Prime minister David Cameron on 4 July 2013 .
 David Cameron
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 David Cameron